{"id":8027,"date":"2026-07-16T23:13:33","date_gmt":"2026-07-16T21:13:33","guid":{"rendered":"https:\/\/blueportance.com\/knowledge-base\/expert-guides\/understanding-pain\/nociceptive-pain\/"},"modified":"2026-10-25T22:43:23","modified_gmt":"2026-10-25T21:43:23","slug":"nociceptive-pain","status":"publish","type":"page","link":"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/understanding-pain\/nociceptive-pain\/","title":{"rendered":"KB 3_Expert Guide_01_Understanding Pain_03_Nociceptive Pain"},"content":{"rendered":"\n\n<style>\n    body{font-family:Arial,sans-serif;line-height:1.65;padding:20px;color:#333}\n    .bp-q-breadcrumb{font-size:.85rem;color:#6b7280;margin:0 0 20px}\n    .bp-q-breadcrumb a{color:#2a7fba;text-decoration:none}\n    .bp-q-breadcrumb a:hover{text-decoration:underline}\n    h1{color:#0e2a47;font-size:1.8rem;line-height:1.25;margin:0 0 22px}\n    h2{color:#1a4d72;margin-top:42px;line-height:1.3}\n    h3{color:#0e2a47;margin-top:28px}\n    p{margin:0 0 16px}\n    ul,ol{margin-top:8px;margin-bottom:18px}\n    li{margin-bottom:7px}\n    table{width:100%;border-collapse:collapse;margin:24px 0;font-size:.9rem}\n    th,td{border:1px solid #d9e1e8;padding:10px;vertical-align:top;text-align:left}\n    th{background:#eef5fb;color:#0e2a47}\n    blockquote{border-left:4px solid #2a7fba;padding:12px 16px;margin:24px 0;color:#4b5563;background:#f8fbff;border-radius:0 6px 6px 0;font-style:italic}\n    .bp-summary{background:#f8fbff;border-left:4px solid #2a7fba;padding:16px 18px;margin:20px 0 26px;border-radius:5px}\n    .bp-summary p{margin:0;font-size:1.04em}\n    .bp-definition{background:#f4f7fa;border:1px solid #e3e9ee;border-radius:9px;padding:18px 20px;margin:22px 0;font-size:.95rem}\n    .bp-definition strong.bp-def-source{display:block;font-size:.78rem;text-transform:uppercase;letter-spacing:.03em;color:#7a7a7a;margin-bottom:8px}\n    .bp-recognize{background:#f8fbff;border:1px solid #dbeaf7;border-radius:9px;padding:18px 20px;margin:24px 0}\n    .bp-recognize h3{margin:0 0 10px;font-size:1rem}\n    .bp-controversy{margin:26px 0;padding:18px 20px;border-left:4px solid #d39b22;border-radius:6px;background:#fff8e1;color:#594900}\n    .bp-controversy h3{margin:0 0 10px;color:#6b5500;font-size:1rem}\n    .bp-model{margin:28px 0;padding:20px;border:1px solid #c5ddf0;border-left:4px solid #2a7fba;border-radius:8px;background:#eef5fb}\n    .bp-model h2{margin-top:0}\n    .bp-takeaway{background:#eef5fb;border:1px solid #d7e6f2;border-radius:8px;padding:18px 20px;margin:30px 0}\n    .bp-takeaway h2{margin-top:0}\n    .bp-takeaway ul{margin-bottom:0}\n    .bp-figure{margin:30px auto;text-align:center;display:flex;flex-direction:column;width:fit-content;max-width:100%}\n    .bp-figure img{display:block;margin:0 auto;max-width:100%;height:auto;border:1px solid #eef1f4;border-radius:8px;background:#fff}\n    .bp-figure figcaption{margin-top:10px;text-align:left;color:#666;font-size:.85em;line-height:1.5}\n    .bp-fig-title{display:block;margin:0 0 4px;font-weight:700;font-size:1em;color:#333;line-height:1.3}\n    .bp-fig-text{display:block;margin:0;font-style:italic}\n    .bp-faq details{margin-bottom:12px;border-radius:8px;overflow:hidden;box-shadow:0 2px 4px rgba(0,0,0,.08);background:#fff}\n    .bp-faq summary{padding:14px 18px;background:#f8f9fa;color:#2c3e50;font-weight:600;cursor:pointer;list-style:none;position:relative;padding-right:42px}\n    .bp-faq summary::-webkit-details-marker{display:none}\n    .bp-faq summary::after{content:\"+\";position:absolute;right:16px;font-size:1.3em;color:#2a7fba}\n    .bp-faq details[open] summary::after{content:\"\u2212\"}\n    .bp-faq .faq-content{padding:14px 18px 18px;color:#495057;font-size:.93rem}\n    .bp-cta{background:#2a7fba;color:#fff;padding:26px;border-radius:8px;margin:40px 0 20px;text-align:center}\n    .bp-cta h2{color:#fff;margin-top:0}\n    .bp-cta a{display:inline-block;margin-top:14px;background:#fff;color:#2a7fba;padding:12px 28px;border-radius:25px;text-decoration:none;font-weight:700}\n    .bp-note{font-size:.85rem;color:#777;border-left:4px solid rgba(0,0,0,.15);background:rgba(0,0,0,.02);padding:12px 16px;border-radius:8px;margin-top:36px}\n    .bp-references{background:#f4f7fa;border:1px solid #e3e9ee;border-radius:9px;padding:18px 20px;margin:28px 0;font-size:.85rem;color:#444}\n    .bp-references h2{margin-top:0;font-size:1.1rem}\n    .bp-references ol{margin:8px 0 0;padding-left:20px}\n    .bp-references li{margin-bottom:9px;line-height:1.5}\n    .bp-references a{color:#2a7fba;text-decoration:none}\n    .bp-references a:hover{text-decoration:underline}\n    .bp-copyright{font-size:.85em;color:#6b7280;margin-top:16px}\n    .bp-bdc-header-card{margin:0 0 24px;padding:22px 26px;border:1px solid #c5ddf0;border-left:4px solid #2a7fba;border-radius:8px;background:#eef5fb;text-align:center}\n    .bp-bdc-kicker{color:#5a8ab0;font-size:.72rem;font-weight:700;letter-spacing:.13em;text-transform:uppercase}\n    .bp-bdc-rule{width:42px;height:2px;margin:9px auto;border-radius:2px;background:#2a7fba}\n    .bp-bdc-dossier-title{margin-top:5px;color:#0e2a47;font-size:1.45rem;font-weight:700}\n    .bp-bdc-dossier-subtitle{max-width:680px;margin:10px auto 0;color:#3a6d8a;font-size:.94rem;font-style:italic;line-height:1.6}\n    .bp-bdc-dossier-link{margin:0 0 26px;font-size:.9rem;color:#3a6d8a}\n    .bp-bdc-dossier-link a{color:#2a7fba;font-weight:600;text-decoration:none}\n    .bp-bdc-dossier-link a:hover{text-decoration:underline}\n    .bp-bdc-epistemic{margin:0 0 24px;padding:15px 18px;border-left:4px solid #d39b22;border-radius:6px;background:#fff8e1;color:#5a4a00;font-size:.9rem}\n    .bp-inline-ref{white-space:nowrap;font-size:.88em;color:#5f6f7d}\n    @media(max-width:640px){\n      body{padding:16px}\n      h1{font-size:1.5rem}\n      table{display:block;overflow-x:auto}\n    }\n    .bp-bdc-toc{background:#f8fbff;border:1px solid #dbeaf7;border-radius:9px;padding:18px 22px;margin:24px 0 32px}\n    .bp-bdc-toc h2{margin:0 0 10px;font-size:1rem;color:#1a4d72}\n    .bp-bdc-toc ul{margin:0;padding-left:20px;list-style:none}\n    .bp-bdc-toc li{margin-bottom:6px;font-size:.92rem}\n    .bp-bdc-toc a{color:#2a7fba;text-decoration:none}\n    .bp-bdc-toc a:hover{text-decoration:underline}\n  <\/style>\n\n<style>\n.bp-bdc-breadcrumb{max-width:900px;margin:0 auto;padding:20px 16px 0;font-size:.85rem;color:#6b7280;}\n.bp-bdc-breadcrumb a{color:#2a7fba;text-decoration:none;}\n.bp-bdc-breadcrumb a:hover{text-decoration:underline;}\n<\/style>\n\n<nav class=\"bp-bdc-breadcrumb\" aria-label=\"Breadcrumb\">\n<a href=\"\/en\/\">Blue Portance<\/a> \u2192 <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/\">Knowledge Base<\/a> \u2192 <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/understanding-pain\/\">Understanding Pain<\/a> \u2192 Nociceptive Pain\n<\/nav>\n\n<div class=\"bp-bdc-header-card\">\n  <div class=\"bp-bdc-kicker\">Blue Portance Expert Guides<\/div>\n  <div class=\"bp-bdc-rule\"><\/div>\n  <div class=\"bp-bdc-dossier-title\">Understanding Pain<\/div>\n  <div class=\"bp-bdc-dossier-subtitle\">\n    The biological, mechanical, and neurophysiological mechanisms that explain the onset and persistence of sitting-related pain.\n  <\/div>\n<\/div>\n\n<p class=\"bp-bdc-dossier-link\">\n  This article is part of the Expert Guide\n  <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/understanding-pain\/\">\u201cUnderstanding Pain\u201d<\/a>.\n<\/p>\n\n<h1>Nociceptive Pain: When Stress Exceeds a Tissue\u2019s Adaptive Capacity<\/h1>\n\n<div class=\"bp-bdc-epistemic\">\n  <strong>Epistemic note<\/strong> \u2014 This article is part of the \u201cUnderstanding Pain\u201d Expert Guide of the Blue Portance Knowledge Base: the concepts defined here form the foundation used throughout the Expert Guides, frequently asked questions, real-life situations, and case studies. In addition, it distinguishes between knowledge established in the scientific literature, the biomechanical model proposed by Blue Portance, and hypotheses or clinical observations that are not yet the subject of an established consensus. Finally, it aims to explain general mechanisms and does not constitute a diagnosis or a medical prescription.\n<\/div>\n\n<section class=\"bp-summary\">\n  <p>\n    Nociceptive pain arises when nociceptors are activated by an actual or potential threat to non-neural tissues. From a biomechanical perspective, this activation can be understood as the result of an interaction between a stress, the tissue that receives it, its adaptive capacity, and the length of time the loading is sustained. A visible lesion is therefore not always necessary: deformation, inflammation, local ischemia, or prolonged stress may be enough to produce or amplify nociceptive activity \u2014 this is notably what is at play in the soft tissues beneath the ischial tuberosities and in the lumbar fascia during prolonged sitting.\n  <\/p>\n<\/section>\n\n<nav class=\"bp-bdc-toc\" aria-label=\"Table of contents\">\n  <h2>Contents<\/h2>\n  <ul>\n      <li><a href=\"#pourquoi-cet-article-est-important\">Why this article matters<\/a><\/li>\n      <li><a href=\"#1-ce-que-signifie-douleur-nociceptive\">1. What \u201cnociceptive pain\u201d means<\/a><\/li>\n      <li><a href=\"#2-de-la-contrainte-au-tissu-la-premiere-etape-du-mecanisme\">2. From stress to tissue: the first step in the mechanism<\/a><\/li>\n      <li><a href=\"#3-la-capacite-dadaptation-tissulaire\">3. Tissue adaptive capacity<\/a><\/li>\n      <li><a href=\"#4-pourquoi-la-duree-et-la-repetition-changent-elles-la-situation\">4. Why do duration and repetition change the situation?<\/a><\/li>\n      <li><a href=\"#5-sensibilisation-peripherique-quand-le-seuil-de-reponse-sabaisse\">5. Peripheral sensitization: when the response threshold drops<\/a><\/li>\n      <li><a href=\"#6-une-douleur-nociceptive-peut-elle-exister-sans-lesion-visible\">6. Can nociceptive pain exist without a visible lesion?<\/a><\/li>\n      <li><a href=\"#7-lecture-proposee-par-le-modele-biomecanique-blue-portance\">7. The interpretation proposed by the Blue Portance biomechanical model<\/a><\/li>\n      <li><a href=\"#8-consequences-pratiques-pour-comprendre-une-douleur\">8. Practical implications for understanding pain<\/a><\/li>\n      <li><a href=\"#a-retenir\">Key takeaways<\/a><\/li>\n      <li><a href=\"#questions-frequentes\">Frequently asked questions<\/a><\/li>\n      <li><a href=\"#vous-cherchez-a-comprendre-ce-qui-entretient-vos-douleurs-en-position-assise\">Trying to understand what keeps your pain going when you sit?<\/a><\/li>\n      <li><a href=\"#references-scientifiques\">Scientific references<\/a><\/li>\n  <\/ul>\n<\/nav>\n\n<h2 id=\"pourquoi-cet-article-est-important\">Why this article matters<\/h2>\n\n<p>\n  The article\n  <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/understanding-pain\/three-pain-mechanisms\/\">\u201cThe Three Mechanisms of Pain\u201d<\/a>\n  distinguishes between nociceptive, neuropathic, and nociplastic mechanisms. This article, for its part, examines the first of them in depth: it seeks not only to define nociceptive pain, but to understand <strong>how a load becomes capable of activating nociceptors<\/strong>, particularly in the tissues that sitting actually puts to work.\n<\/p>\n\n<p>\n  The central question is therefore not simply \u201cIs the tissue damaged?\u201d but rather:\n<\/p>\n\n<blockquote>\n  what stress is acting, on which tissue, at what intensity, for how long, and with what opportunity for recovery?\n<\/blockquote>\n\n<p>\n  In practice, this way of reasoning helps explain why the same pressure, the same movement, or the same posture can be well tolerated at one moment and become painful at another.\n<\/p>\n\n<h2 id=\"1-ce-que-signifie-douleur-nociceptive\">1. What \u201cnociceptive pain\u201d means<\/h2>\n\n<div class=\"bp-definition\">\n  <strong class=\"bp-def-source\">IASP terminology<\/strong>\n  <p>\n    Nociceptive pain is associated with actual or potential damage to non-neural tissue and results from the activation of nociceptors. It differs, however, from neuropathic pain, which implies a lesion or disease of the somatosensory nervous system.\n  <\/p>\n<\/div>\n\n<p>\n  Nociceptors are specialized sensory nerve endings capable of detecting potentially threatening mechanical, thermal, or chemical stimuli. When activated, they produce signals that are transmitted to the spinal cord and then to brain structures, where this information is modulated and integrated <span class=\"bp-inline-ref\">(Basbaum et&nbsp;al., 2009; Dubin &amp; Patapoutian, 2010)<\/span>.\n<\/p>\n\n<p>\n  Nociception, however, is not pain itself. In concrete terms, it refers to the activity of the sensory system that detects and transmits a potential threat. Pain, for its part, is the experience that results from integrating this activity with other biological, contextual, and personal information.\n<\/p>\n\n<figure class=\"bp-figure\">\n  <img decoding=\"async\"\n    src=\"https:\/\/blueportance.com\/wp-content\/uploads\/III.1.How-a-mechanical-stress-becomes-nociceptive-pain.png\"\n    alt=\"Diagram showing how mechanical stress can exceed tissue adaptive capacity, activate nociceptors, and contribute to nociceptive pain.\"\n    loading=\"lazy\"\n  \/>\n  <figcaption>\n    <span class=\"bp-fig-title\">Figure 1 \u2014 How stress becomes nociceptive pain<\/span>\n    <span class=\"bp-fig-text\">Mechanical stress does not automatically cause pain. In reality, pain arises when the tissue&#8217;s local adaptive capacity is exceeded, triggering nociceptor activation and the transmission of a pain signal.<\/span>\n  <\/figcaption>\n<\/figure>\n\n<h2 id=\"2-de-la-contrainte-au-tissu-la-premiere-etape-du-mecanisme\">2. From stress to tissue: the first step in the mechanism<\/h2>\n\n<p>\n  Nociceptive pain can be triggered by several families of stimuli, among others:\n<\/p>\n\n<ul>\n  <li><strong>mechanical<\/strong>: pressure, compression, tension, shear, friction, impact, or repeated deformation;<\/li>\n  <li><strong>thermal<\/strong>: for example, heat or cold capable of threatening tissue integrity;<\/li>\n  <li><strong>chemical<\/strong>: notably mediators released during inflammation, cellular injury, or a local metabolic disturbance.<\/li>\n<\/ul>\n\n<figure class=\"bp-figure\">\n  <img decoding=\"async\"\n    src=\"https:\/\/blueportance.com\/wp-content\/uploads\/III.2.The-main-mechanical-stresses-applied-to-tissues.png\"\n    alt=\"Diagram showing pressure, compression, tension, shear, friction, and other mechanical stresses that can load biological tissues.\"\n    loading=\"lazy\"\n  \/>\n  <figcaption>\n    <span class=\"bp-fig-title\">Figure 2 \u2014 Mechanical stresses applied to tissues<\/span>\n    <span class=\"bp-fig-text\">The main mechanical stresses likely to load tissues. Together, their intensity, duration, repetition, and distribution determine the tissue response.<\/span>\n  <\/figcaption>\n<\/figure>\n\n<p>\n  In sitting-related pain, stresses are therefore often mechanical and time-dependent. Pressure can remain tolerable when it is brief, but become problematic if it is concentrated on a small area, sustained without variation, or repeated before the tissue has recovered.\n<\/p>\n\n<p>\n  Many structures can contribute to nociceptive activity: skin, subcutaneous tissue, muscles, tendons, entheses, ligaments, joint capsules, fascia, periosteum, and the connective tissue sheaths of nerves. Moreover, their involvement cannot be inferred from the name of the pain alone; it depends on the location, the triggers, the timing, and the anatomical consistency of the situation. In the specific context of sitting, two areas notably concentrate these stresses: the soft tissues beneath the <strong>ischial tuberosities<\/strong> \u2014 skin, subcutaneous fat, fascia, and neighboring ligamentous structures, including the sacrotuberous ligaments \u2014 which bear most of the weight of the upper body; and the <strong>lumbar and thoracolumbar fascia<\/strong>, loaded by the prolonged maintenance of a posture with little variation.\n<\/p>\n\n<h3>Example: ischial compression during prolonged sitting<\/h3>\n\n<p>\n  When sitting, the weight of the upper body is concentrated notably on a small area: the soft tissues beneath the ischial tuberosities. When sitting is prolonged and varies little, and the weight distribution remains concentrated on the same contact points, several of the dimensions described below combine: high local intensity, prolonged duration, repetition without real recovery, and poorly diffused distribution. Together, these factors may then be enough to activate nociceptors present in these tissues, without any structural lesion necessarily being involved.\n<\/p>\n\n<p>\n  Likewise, this reasoning applies to the lumbar and thoracolumbar fascia: maintaining a seated posture with little variation limits its natural gliding and concentrates stress on the same fibers, which may, over time, contribute to the activation or sensitization of its own nociceptors <span class=\"bp-inline-ref\">(Schleip et&nbsp;al., 2012)<\/span> \u2014 a mechanism discussed more broadly in the article <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/understanding-pain\/nervous-system-hypersensitization\/\">\u201cNervous System Hypersensitization\u201d<\/a>.\n<\/p>\n\n<h2 id=\"3-la-capacite-dadaptation-tissulaire\">3. Tissue adaptive capacity<\/h2>\n\n<div class=\"bp-definition\">\n  <strong class=\"bp-def-source\">Proposed biomechanical framework<\/strong>\n  <p>\n    Tissue adaptive capacity here refers to a structure\u2019s ability to withstand, distribute, or compensate for stress while maintaining a function compatible with the situation.\n  <\/p>\n<\/div>\n\n<p>\n  This concept does not correspond to a fixed value. Rather, it serves to organize several dimensions that determine the effect of a given load:\n<\/p>\n\n<figure class=\"bp-figure\">\n  <img decoding=\"async\"\n    src=\"https:\/\/blueportance.com\/wp-content\/uploads\/III.3.Tissue-adaptability-the-key-factor.png\"\n    alt=\"Diagram illustrating the relationship between mechanical stress and a tissue\u2019s adaptive capacity.\"\n    loading=\"lazy\"\n  \/>\n  <figcaption>\n    <span class=\"bp-fig-title\">Figure 3 \u2014 Tissue adaptive capacity<\/span>\n    <span class=\"bp-fig-text\">Tissue adaptive capacity is the central element of the nociceptive mechanism. As long as stresses remain compatible with the tissue&#8217;s capacity to adapt, no pain signal is generated.<\/span>\n  <\/figcaption>\n<\/figure>\n\n<table aria-label=\"Dimensions of tissue adaptive capacity\">\n  <thead>\n    <tr>\n      <th>Dimension<\/th>\n      <th>Question to ask<\/th>\n      <th>Possible effect<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td><strong>Intensity<\/strong><\/td>\n      <td>What force or pressure is applied?<\/td>\n      <td>High intensity can then quickly exceed local capacity.<\/td>\n    <\/tr>\n    <tr>\n      <td><strong>Duration<\/strong><\/td>\n      <td>How long does the stress remain applied?<\/td>\n      <td>Moderate stress can, as a result, become problematic when it is prolonged.<\/td>\n    <\/tr>\n    <tr>\n      <td><strong>Repetition<\/strong><\/td>\n      <td>Does the loading recur before recovery?<\/td>\n      <td>Successive episodes can then accumulate their effects.<\/td>\n    <\/tr>\n    <tr>\n      <td><strong>Distribution<\/strong><\/td>\n      <td>Is the load diffuse or concentrated?<\/td>\n      <td>Concentrating it therefore increases local stress.<\/td>\n    <\/tr>\n    <tr>\n      <td><strong>Variability<\/strong><\/td>\n      <td>Do contact points and movements change?<\/td>\n      <td>A lack of variation thus prolongs the loading of the same structures.<\/td>\n    <\/tr>\n    <tr>\n      <td><strong>Tissue condition<\/strong><\/td>\n      <td>Is there inflammation, fatigue, a scar, or pre-existing vulnerability?<\/td>\n      <td>The response threshold may, consequently, be lowered.<\/td>\n    <\/tr>\n    <tr>\n      <td><strong>Recovery<\/strong><\/td>\n      <td>Does the tissue have enough time and adequate conditions to recover?<\/td>\n      <td>Insufficient recovery may, in effect, promote persistent sensitivity.<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n<div class=\"bp-recognize\">\n  <h3>The same stress does not always produce the same response<\/h3>\n  <p>\n    Pressure can be painless when it is brief, distributed, and followed by sufficient recovery. Conversely, it can become painful when it is concentrated, prolonged, or acts on an already sensitized structure. Variability in the response therefore does not mean that the pain is arbitrary: it reflects the interaction between the stress, the tissue, and the biological context in which it occurs.\n  <\/p>\n<\/div>\n\n<h2 id=\"4-pourquoi-la-duree-et-la-repetition-changent-elles-la-situation\">4. Why do duration and repetition change the situation?<\/h2>\n\n<p>\n  A load is not defined solely by its peak intensity. In fact, its effect depends on how it unfolds over time.\n<\/p>\n\n<p>\n  Prolonged stress can maintain a deformation, limit local exchanges, increase interstitial pressure, or reduce the capacity for gliding between certain structures. Repeated stress, for its part, can load the same area several times before local processes have had time to return to normal.\n<\/p>\n\n<p>\n  This time dimension helps explain two frequently observed patterns:\n<\/p>\n\n<ul>\n  <li><strong>immediate pain<\/strong>: pressure, contact, or movement quickly reproduces the pain;<\/li>\n  <li><strong>progressive pain<\/strong>: the area is tolerable at first, then becomes painful with duration, repetition, or fatigue.<\/li>\n<\/ul>\n\n<p>\n  These patterns guide the reasoning, but they are not sufficient on their own to identify the mechanism. Neuropathic or nociplastic pain can also be influenced by posture or by the duration of exposure.\n<\/p>\n\n<h2 id=\"5-sensibilisation-peripherique-quand-le-seuil-de-reponse-sabaisse\">5. Peripheral sensitization: when the response threshold drops<\/h2>\n\n<p>\n  When a tissue is inflamed or exposed to certain chemical mediators, nociceptors can become more reactive. As a result, their activation threshold decreases and their response to a stimulus may increase. This phenomenon is called <strong>peripheral sensitization<\/strong> <span class=\"bp-inline-ref\">(Gold &amp; Gebhart, 2010)<\/span>.\n<\/p>\n\n<p>\n  A previously well-tolerated stimulus may then become painful, and an already painful stimulus may produce a more intense response. This change remains compatible with a nociceptive mechanism: it reflects increased reactivity of the peripheral nerve endings, without in itself implying a lesion of the somatosensory system or nociplastic pain.\n<\/p>\n\n<figure class=\"bp-figure\">\n  <img decoding=\"async\"\n    src=\"https:\/\/blueportance.com\/wp-content\/uploads\/III.4.From-inflammation-to-nociceptor-sensitization.png\"\n    alt=\"Diagram showing how inflammatory or chemical mediators can lower nociceptor activation thresholds and increase their responsiveness.\"\n    loading=\"lazy\"\n  \/>\n  <figcaption>\n    <span class=\"bp-fig-title\">Figure 4 \u2014 Peripheral sensitization of nociceptors<\/span>\n    <span class=\"bp-fig-text\">Peripheral sensitization increases the reactivity of nociceptors. The same stimulus can then produce a greater pain response.<\/span>\n  <\/figcaption>\n<\/figure>\n\n<h2 id=\"6-une-douleur-nociceptive-peut-elle-exister-sans-lesion-visible\">6. Can nociceptive pain exist without a visible lesion?<\/h2>\n\n<p>\n  Yes. The international definition refers to <strong>actual or potential<\/strong> damage to non-neural tissues. Sustained deformation, local inflammation, transient ischemia, or a functional disturbance can activate or sensitize nociceptors without producing a tear or a detectable macroscopic abnormality.\n<\/p>\n\n<p>\n  Conversely, an abnormality visible on imaging can remain silent. Imaging describes certain anatomical features; it measures neither nociceptor activity nor the intensity of the pain experience.\n<\/p>\n\n<div class=\"bp-controversy\">\n  <h3>What not to conclude<\/h3>\n  <ul>\n    <li>Normal imaging does not prove the absence of a nociceptive mechanism.<\/li>\n    <li>Likewise, a visible abnormality does not prove that it explains all of the pain.<\/li>\n    <li>Moreover, intense pain does not provide a direct measure of the extent of a lesion.<\/li>\n    <li>Finally, pain triggered by a posture is not enough to rule out a neuropathic or nociplastic component.<\/li>\n    <li>The exact role of fascia in producing pain remains debated: is it a primary generator through its own nociceptors, or merely an amplifier of stresses transmitted from other structures <span class=\"bp-inline-ref\">(Schleip et&nbsp;al., 2012)<\/span>? Current evidence leans toward a mixed role, without settling the question definitively.<\/li>\n  <\/ul>\n<\/div>\n\n<h2 id=\"7-lecture-proposee-par-le-modele-biomecanique-blue-portance\">7. The interpretation proposed by the Blue Portance biomechanical model<\/h2>\n\n<div class=\"bp-model\">\n  <p>\n    The Blue Portance biomechanical model does not propose a new definition of nociceptive pain. Rather, it seeks to connect the existing definition to the concrete organization of stresses.\n  <\/p>\n\n  <blockquote>\n    stress \u2192 tissue \u2192 adaptive capacity \u2192 nociceptive activity \u2192 transmission and modulation \u2192 pain \u2192 behavior \u2192 adaptation\n  <\/blockquote>\n\n  <figure class=\"bp-figure\">\n    <img decoding=\"async\"\n      src=\"https:\/\/blueportance.com\/wp-content\/uploads\/III.5.Biomechanical-interpretation-of-nociceptive-pain.png\"\n      alt=\"Diagram linking mechanical stress, tissue adaptive capacity, nociceptive activity, neural transmission, and pain.\"\n      loading=\"lazy\"\n    \/>\n    <figcaption>\n      <span class=\"bp-fig-title\">Figure 5 \u2014 A biomechanical reading of nociceptive pain<\/span>\n      <span class=\"bp-fig-text\">Biomechanical interpretation proposed by Blue Portance. In practice, the model links the organization of stresses, tissue adaptive capacity, and the onset of nociceptive activity that may be perceived as pain.<\/span>\n    <\/figcaption>\n  <\/figure>\n\n  <p>\n    This interpretation rests on four complementary questions:\n  <\/p>\n\n  <ol>\n    <li><strong>What is the nature of the stress?<\/strong> For example, compression, tension, shear, friction, vibration, or a combination of several loads.<\/li>\n    <li><strong>Which structure receives it?<\/strong> Skin, muscle, tendon, fascia, ligament, capsule, periosteum, or the sheaths of a nerve.<\/li>\n    <li><strong>How does the stress evolve over time?<\/strong> Immediate onset, progressive accumulation, repetition, or lack of variation.<\/li>\n    <li><strong>What are the possibilities for adaptation and recovery?<\/strong> Distribution of contact points, available mobility, alternation of positions, and the prior condition of the tissues.<\/li>\n  <\/ol>\n\n  <p>\n    In sitting-related pain, this framework notably leads to examining whether an area bears overly concentrated pressure \u2014 typically beneath the ischial tuberosities \u2014, whether contact points remain monotonous, whether the lumbar fascia is placed under prolonged tension, or whether pain appears only after a certain duration of exposure.\n  <\/p>\n<\/div>\n\n<h2 id=\"8-consequences-pratiques-pour-comprendre-une-douleur\">8. Practical implications for understanding pain<\/h2>\n\n<p>\n  In concrete terms, a nociceptive hypothesis leads one to look for a consistent relationship between a stress and a structure, without reducing the reasoning to the presence of a lesion.\n<\/p>\n\n<ul>\n  <li><strong>Location:<\/strong> does the pain correspond to an anatomically plausible area?<\/li>\n  <li><strong>Trigger:<\/strong> do contact, pressure, movement, or posture reproduce it?<\/li>\n  <li><strong>Timing:<\/strong> does it appear immediately or increase progressively?<\/li>\n  <li><strong>Reversibility:<\/strong> does it decrease when the stress is removed, distributed, or modified?<\/li>\n  <li><strong>Local tissue context:<\/strong> is there inflammation, a scar, fatigue, fragility, or pre-existing sensitivity?<\/li>\n  <li><strong>Associated mechanisms:<\/strong> do certain signs also suggest somatosensory damage or more broadly altered nociception?<\/li>\n<\/ul>\n\n<p>\n  This framework does not establish a diagnosis. Rather, it organizes the analysis and avoids two opposite errors: attributing all pain to a visible lesion, or dismissing a peripheral contribution too quickly when no major abnormality is found.\n<\/p>\n\n<div class=\"bp-takeaway\">\n  <h2 id=\"a-retenir\">Key takeaways<\/h2>\n  <ul>\n    <li>Nociceptive pain involves the activation of nociceptors by an actual or potential threat to non-neural tissues.<\/li>\n    <li>Nociception and pain are related, but the two terms are not interchangeable.<\/li>\n    <li>Moreover, the effect of a stress depends on its intensity, duration, repetition, and distribution, and on the condition of the tissue.<\/li>\n    <li>When sitting, the soft tissues beneath the ischial tuberosities and the lumbar fascia notably concentrate these stresses.<\/li>\n    <li>Moderate stress can thus become painful when it is prolonged or repeated without sufficient recovery.<\/li>\n    <li>Nociceptive pain can, however, exist without a visible macroscopic lesion.<\/li>\n    <li>In addition, peripheral sensitization lowers the response threshold of nociceptors.<\/li>\n    <li>Finally, the Blue Portance model links the definition of the mechanism to the nature of the stresses, adaptive capacity, and timing.<\/li>\n  <\/ul>\n<\/div>\n\n<section class=\"bp-faq\">\n  <h2 id=\"questions-frequentes\">Frequently asked questions<\/h2>\n\n  <details>\n    <summary>Does nociceptive pain imply a visible lesion?<\/summary>\n    <div class=\"faq-content\">\n      No. Stress, inflammation, local ischemia, or sustained deformation can activate or sensitize nociceptors without producing a macroscopic lesion visible on standard diagnostic testing.\n    <\/div>\n  <\/details>\n\n  <details>\n    <summary>Why can moderate stress become painful over time?<\/summary>\n    <div class=\"faq-content\">\n      Because the effect of a stress also depends on its duration, its repetition, the recovery available, and the condition of the tissue. A stress tolerated briefly can thus exceed local capacity when it is prolonged.\n    <\/div>\n  <\/details>\n\n  <details>\n    <summary>Is nociceptive pain always proportional to a lesion?<\/summary>\n    <div class=\"faq-content\">\n      No. Pain intensity depends on nociceptive activity, but also on how the nervous system modulates and integrates it. It is therefore not a direct measure of the extent of a lesion.\n    <\/div>\n  <\/details>\n\n  <details>\n    <summary>Is pain caused by sitting necessarily nociceptive?<\/summary>\n    <div class=\"faq-content\">\n      No. A link with a posture or with pressure is a mechanical clue, but it is not enough to determine the mechanism. Moreover, pain can combine nociceptive, neuropathic, or nociplastic components.\n    <\/div>\n  <\/details>\n<\/section>\n\n<div class=\"bp-cta\">\n  <h2 id=\"vous-cherchez-a-comprendre-ce-qui-entretient-vos-douleurs-en-position-assise\">Trying to understand what keeps your pain going when you sit?<\/h2>\n  <p>\n    The analysis draws notably on location, stresses, timing, the structures involved, and the mechanisms likely to combine.\n  <\/p>\n  <a href=\"https:\/\/blueportance.com\/en\/personalized-pain-analysis\/\">Analyze my situation \u2192<\/a>\n<\/div>\n\n<p class=\"bp-note\">\n  <strong>Note:<\/strong> this content explains general mechanisms of nociceptive pain. It therefore cannot determine remotely the mechanism of an individual\u2019s pain and does not replace the advice of a healthcare professional.\n<\/p>\n\n<section class=\"bp-references\">\n  <h2 id=\"references-scientifiques\">Scientific references<\/h2>\n  <ol>\n    <li>\n      International Association for the Study of Pain (IASP).\n      <em>IASP Terminology.<\/em>\n      <a href=\"https:\/\/www.iasp-pain.org\/resources\/terminology\/\" target=\"_blank\" rel=\"noopener\">Official terminology<\/a>.\n    <\/li>\n<li>\n      Basbaum AI, Bautista DM, Scherrer G, Julius D.\n      <em>Cellular and molecular mechanisms of pain.<\/em>\n      Cell. 2009;139(2):267\u2013284. doi:10.1016\/j.cell.2009.09.028.\n    <\/li>\n    <li>\n      Dubin AE, Patapoutian A.\n      <em>Nociceptors: the sensors of the pain pathway.<\/em>\n      Journal of Clinical Investigation. 2010;120(11):3760\u20133772. doi:10.1172\/JCI42843.\n    <\/li>\n    <li>\n      Gold MS, Gebhart GF.\n      <em>Nociceptor sensitization in pain pathogenesis.<\/em>\n      Nature Medicine. 2010;16(11):1248\u20131257. doi:10.1038\/nm.2235.\n    <\/li>\n    <li>\n      Schleip, R., et al.\n      <em>Fascia as a sensory organ.<\/em>\n      In: <em>Fascia: The Tensional Network of the Human Body.<\/em> Churchill Livingstone \/ Elsevier, 2012.\n    <\/li>\n  <\/ol>\n  <h3>Further reading<\/h3>\n  <ul>\n    <li>\n      Raja SN, Carr DB, Cohen M, et al.\n      <em>The revised International Association for the Study of Pain definition of pain: concepts, challenges and compromises.<\/em>\n      Pain. 2020;161(9):1976\u20131982. doi:10.1097\/j.pain.0000000000001939.\n    <\/li>\n  <\/ul>\n<\/section>\n\n<p class=\"bp-copyright\">\n  \u00a9 Gil Ayache. The concepts, diagrams, terminology, and principles presented on this page constitute a work protected by copyright. They are made available to Blue Portance under an intellectual property license agreement, without transfer of economic rights or of authorship.\n<\/p>\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Blue Portance \u2192 Knowledge Base \u2192 Understanding Pain \u2192 Nociceptive Pain Blue Portance Expert Guides Understanding Pain The biological, mechanical, and neurophysiological mechanisms that explain the onset and persistence of sitting-related pain. This article is part of the Expert Guide \u201cUnderstanding Pain\u201d. Nociceptive Pain: When Stress Exceeds a Tissue\u2019s Adaptive Capacity Epistemic note \u2014 This [&#8230;]\n","protected":false},"author":6,"featured_media":0,"parent":8012,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_yoast_wpseo_title":"Nociceptive Pain and Tissue Capacity | Blue Portance","_yoast_wpseo_metadesc":"Nociceptive pain appears when mechanical stress exceeds a tissue's adaptive capacity. Mechanisms and biomechanical reading.","footnotes":""},"pathologie_secondaire":[],"effet_positif":[],"class_list":["post-8027","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.7 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Nociceptive Pain and Tissue Capacity | Blue Portance<\/title>\n<meta name=\"description\" content=\"Nociceptive pain appears when mechanical stress exceeds a tissue&#039;s adaptive capacity. Mechanisms and biomechanical reading.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/understanding-pain\/nociceptive-pain\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Nociceptive Pain and Tissue Capacity \u2013 Blue Portance\" \/>\n<meta property=\"og:description\" content=\"Nociceptive pain appears when mechanical stress exceeds a tissue&#039;s adaptive capacity. Mechanisms and biomechanical reading.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/understanding-pain\/nociceptive-pain\/\" \/>\n<meta property=\"og:site_name\" content=\"Blue Portance\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/people\/Blue-Portance\/100095243965964\/\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-25T21:43:23+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blueportance.com\/wp-content\/uploads\/III.1.How-a-mechanical-stress-becomes-nociceptive-pain.png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Nociceptive Pain and Tissue Capacity \u2013 Blue Portance\" \/>\n<meta name=\"twitter:description\" content=\"Nociceptive pain appears when mechanical stress exceeds a tissue&#039;s adaptive capacity. Mechanisms and biomechanical reading.\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Nociceptive Pain and Tissue Capacity | Blue Portance","description":"Nociceptive pain appears when mechanical stress exceeds a tissue's adaptive capacity. Mechanisms and biomechanical reading.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/understanding-pain\/nociceptive-pain\/","og_locale":"en_US","og_type":"article","og_title":"Nociceptive Pain and Tissue Capacity \u2013 Blue Portance","og_description":"Nociceptive pain appears when mechanical stress exceeds a tissue's adaptive capacity. Mechanisms and biomechanical reading.","og_url":"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/understanding-pain\/nociceptive-pain\/","og_site_name":"Blue Portance","article_publisher":"https:\/\/www.facebook.com\/people\/Blue-Portance\/100095243965964\/","article_modified_time":"2026-10-25T21:43:23+00:00","og_image":[{"url":"https:\/\/blueportance.com\/wp-content\/uploads\/III.1.How-a-mechanical-stress-becomes-nociceptive-pain.png","type":"","width":"","height":""}],"twitter_card":"summary_large_image","twitter_title":"Nociceptive Pain and Tissue Capacity \u2013 Blue Portance","twitter_description":"Nociceptive pain appears when mechanical stress exceeds a tissue's adaptive capacity. Mechanisms and biomechanical reading.","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/understanding-pain\/nociceptive-pain\/","url":"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/understanding-pain\/nociceptive-pain\/","name":"Nociceptive Pain and Tissue Capacity | Blue Portance","isPartOf":{"@id":"https:\/\/blueportance.com\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/understanding-pain\/nociceptive-pain\/#primaryimage"},"image":{"@id":"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/understanding-pain\/nociceptive-pain\/#primaryimage"},"thumbnailUrl":"https:\/\/blueportance.com\/wp-content\/uploads\/III.1.How-a-mechanical-stress-becomes-nociceptive-pain.png","datePublished":"2026-07-16T21:13:33+00:00","dateModified":"2026-10-25T21:43:23+00:00","description":"Nociceptive pain appears when mechanical stress exceeds a tissue's adaptive capacity. Mechanisms and biomechanical reading.","breadcrumb":{"@id":"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/understanding-pain\/nociceptive-pain\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/understanding-pain\/nociceptive-pain\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/understanding-pain\/nociceptive-pain\/#primaryimage","url":"https:\/\/blueportance.com\/wp-content\/uploads\/III.1.How-a-mechanical-stress-becomes-nociceptive-pain.png","contentUrl":"https:\/\/blueportance.com\/wp-content\/uploads\/III.1.How-a-mechanical-stress-becomes-nociceptive-pain.png"},{"@type":"BreadcrumbList","@id":"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/understanding-pain\/nociceptive-pain\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Accueil","item":"https:\/\/blueportance.com\/en\/"},{"@type":"ListItem","position":2,"name":"KB_HUB Knowledge Base","item":"https:\/\/blueportance.com\/en\/centre-de-connaissances\/"},{"@type":"ListItem","position":3,"name":"KB 3_Expert Guides_00_Child Hub Page","item":"https:\/\/blueportance.com\/en\/centre-de-connaissances\/dossiers-experts\/"},{"@type":"ListItem","position":4,"name":"KB 3_Expert Guide_01_Understanding Pain_00_Pillar Page","item":"https:\/\/blueportance.com\/en\/centre-de-connaissances\/dossiers-experts\/comprendre-la-douleur\/"},{"@type":"ListItem","position":5,"name":"KB 3_Expert Guide_01_Understanding Pain_03_Nociceptive Pain"}]},{"@type":"WebSite","@id":"https:\/\/blueportance.com\/en\/#website","url":"https:\/\/blueportance.com\/en\/","name":"Blue Portance","description":"Assises ergonomiques pour une posture saine et dynamique","publisher":{"@id":"https:\/\/blueportance.com\/en\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/blueportance.com\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/blueportance.com\/en\/#organization","name":"Blue Portance","url":"https:\/\/blueportance.com\/en\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/blueportance.com\/en\/#\/schema\/logo\/image\/","url":"https:\/\/blueportance.com\/wp-content\/uploads\/Logo-Blue-Portance.webp","contentUrl":"https:\/\/blueportance.com\/wp-content\/uploads\/Logo-Blue-Portance.webp","width":246,"height":50,"caption":"Blue Portance"},"image":{"@id":"https:\/\/blueportance.com\/en\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/people\/Blue-Portance\/100095243965964\/"]}]}},"_links":{"self":[{"href":"https:\/\/blueportance.com\/en\/wp-json\/wp\/v2\/pages\/8027","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blueportance.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blueportance.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blueportance.com\/en\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/blueportance.com\/en\/wp-json\/wp\/v2\/comments?post=8027"}],"version-history":[{"count":3,"href":"https:\/\/blueportance.com\/en\/wp-json\/wp\/v2\/pages\/8027\/revisions"}],"predecessor-version":[{"id":8565,"href":"https:\/\/blueportance.com\/en\/wp-json\/wp\/v2\/pages\/8027\/revisions\/8565"}],"up":[{"embeddable":true,"href":"https:\/\/blueportance.com\/en\/wp-json\/wp\/v2\/pages\/8012"}],"wp:attachment":[{"href":"https:\/\/blueportance.com\/en\/wp-json\/wp\/v2\/media?parent=8027"}],"wp:term":[{"taxonomy":"pathologie_secondaire","embeddable":true,"href":"https:\/\/blueportance.com\/en\/wp-json\/wp\/v2\/pathologie_secondaire?post=8027"},{"taxonomy":"effet_positif","embeddable":true,"href":"https:\/\/blueportance.com\/en\/wp-json\/wp\/v2\/effet_positif?post=8027"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}