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Episode 166: The Body Can't Heal Pain It Still Perceives as a Threat

  • 5 days ago
  • 19 min read































Chronic pain and trauma follow the same biological pattern — and that pattern explains why doing everything right still leaves people in pain.


By the time a pain signal is firing, the body is not in stress. It has already crossed the critical line of overwhelm. That is a different biology entirely — one where the nervous system has shifted into survival strategies including energy conservation, dissociation, and immobilization. In survival mode, the body does not have resources available for healing. It only has enough to stay alive.


This is why anti-inflammatory protocols, therapy, and nervous system practices can all be working and pain can still flare. The flare is not a failure of the approach. It is a signal that the nervous system has crossed the line — and needs different tools than stress management can provide.


Neuroception — the nervous system's subconscious safety calculation — is what determines whether a pain flare happens. It is running in the background at all times, reading cues from the body and the environment, deciding: safe or not safe? When the answer is not safe, the physiology shifts toward overwhelm. That shift is where chronic pain lives.


What changes this pattern is not managing pain. It is building the five core nervous system skills — the ability to feel, shift state, pace, track, and choose — so the nervous system can spend less time past the critical line, and more time in the calm-alive state where healing actually happens.



Key Takeaways


  • Chronic pain is a trauma pattern, not just a tissue problem. It becomes chronic through the same mechanism as trauma — the body failing to reset to safety after crossing the critical line of overwhelm.

  • The critical line of overwhelm is a different biology than stress. Above it, survival strategies take over — dissociation, immobilization, energy conservation — and the body's healing mechanisms go offline.

  • Adrenaline is the body's natural pain suppressant — and overwhelm removes it. Pain becomes loudest not during stress, but after the nervous system crosses into shutdown and that chemistry is withdrawn.

  • Neuroception controls whether a pain flare happens. This subconscious threat-detection process (Dr. Stephen Porges, polyvagal theory) reads body, environment, and relational cues — when it reads threat, the body cannot heal.

  • Energy conservation blocks healing at the biological level. Past the critical line, the body directs just enough energy to survive — not to repair tissue, detoxify, or regulate the mitochondria.

  • Capacity — not stress — determines where the critical line sits. The body responds to whether capacity meets demand. Building capacity through nervous system skill development moves the line.

  • The five core nervous system skills are learnable and specific. Feel. Shift state. Pace. Track. Choose. Each one expands the window of tolerance before the body crosses into overwhelm.




In This Episode You'll Learn:


[00:00] Why chronic pain is an overwhelm problem — not a stress problem

[01:34] How pain becomes chronic and why it follows the same biological pattern as trauma

[03:06] Stress is not trauma and trauma is not stress

[03:20] What the critical line of overwhelm is — and why the body stays braced long after the danger is gone

[05:59] The Loop and what it does to the body's healing mechanisms

[08:11] How adrenaline suppresses pain during stress — and what happens when it's removed in overwhelm

[08:49] What microglia are and why they follow the same threshold pattern as the nervous system

[09:30] The three survival strategies the body activates past the critical line — dissociation, freeze, and energy conservation

[11:40] What neuroception is and why it controls whether a pain flare happens

[13:42] Why capacity — not stress — determines where your critical line sits

[15:10] The five nervous system skills that build capacity before the line is crossed - that every adult and every person with chronic pain needs to know — what each skill does and why it matters

[17:44] Why we only go as fast as the slowest part of me feels safe to go

[18:44] How to interrupt a chronic pain cycle before it crosses the line

[20:52] The Three Rs framework — how to recognize, understand, and repair a chronic pain pattern

[22:40] Key Takeaways And Guide





Notable Quotes ~ Dr. Aimie


CHRONIC PAIN IS AN OVERWHELM PROBLEM

  • "By the time pain becomes chronic, it is not about stress anymore."

  • "Pain is information. And the information it is giving you is overwhelm."

  • "Stress is not bad. Stress is not what makes chronic pain flare up. Stress is just stress. What really matters for pain is what is my capacity to respond to that stress."

  • "By the time that your pain is showing up and giving you information, it's because you are at that line of overwhelm."

  • "Most of the time, pain is not present as much during the stress response as it is during the overwhelm response."

  • "Chronic pain is not a stress problem. It is an overwhelm problem. That distinction matters because it changes the interventions that we use."



THE CRITICAL LINE

  • "We have all crossed this critical line at one point in our life. There is that shock that exceeds our ability to overcome with action. In that moment, our physiology switches survival strategies."

  • "Without a full reset to safety, our body remains with the perception that the danger might still be there."



THE LOOP

  • "When the perception of danger remains, the physiology loops between stress and overwhelm."

  • "Even though we walk away from the scene of the car accident, in our body it's still bracing because it doesn't know that it's over."

  • "The danger is truly not over. It's not happening right now this second, but it could happen in the next minute. So I must stay braced."

  • "We can get into these loops where we're looping through stress and overwhelm several times in the same day."

  • "We reach a point where the body says, I don't know if the danger's really over. And so I'm going to get into a loop."

  • "The pattern of pain is directly related to the internal physiological state."



ADRENALINE & PAIN

  • "Adrenaline is a way of numbing pain."

  • "The natural hormones that happen during a stress response help numb pain so that we can take action and respond to the danger in our life. It's when that gets removed, as it does in the overwhelm physiology, that we feel more of that pain."



NEUROCEPTION & CAPACITY

  • "Neuroception is a subconscious calculation that's always happening in the background. Am I in danger or am I safe? That is what will determine our physiological state."

  • "What really matters for pain is what is my capacity to respond to that stress. If I have the capacity, then I'm still safe. Safe enough. It's when that capacity doesn't match up that my physiology will go into the overwhelm response. And that is where chronic pain lies."



THE FIVE CORE NERVOUS SYSTEM SKILLS

  • "We only go as fast as the slowest part of me feels safe to go."

  • "Can I track — allows me to start to see this progression, this transition, which then allows me to insert space between trigger and reaction. It is not mindset work. This is a skill."

  • "Building capacity matters more than managing symptoms."





Episode Takeaway

When someone comes to me with chronic pain, one of the first things I want them to understand is that their body has not made a mistake. The pain is not random. It is not irrational. It is a signal — and specifically, it is a signal of overwhelm. By the time pain is showing up consistently, the nervous system has almost always already crossed that critical line.


What I find consistently underappreciated in pain treatment is the role of adrenaline. During a stress response, the body naturally produces endorphins and adrenaline that suppress pain — this is the biology behind the runner's high. The body does this so you can move through danger. But when someone crosses into overwhelm, when the nervous system shifts from mobilization to shutdown, that natural pain suppression is removed. That is when the pain becomes loudest. People often describe it as feeling like the stress caused the pain. What's actually happening is the transition from stress into overwhelm.


This is why I spend so much time teaching the five core nervous system skills — feeling, state-shifting, pacing, tracking, and choosing. These skills are central to everything I teach. They build the very thing that determines where the critical line sits: capacity. When capacity increases, the critical line moves. And when the nervous system can stay in a range where it still perceives enough safety, the body's own healing biology can do its work. Not because we've forced it — but because we've created the conditions it needs.


The Three Rs framework I use — Recognize the trauma pattern, identify the underlying Reasons, apply the Repair tools — applies directly to chronic pain. Because chronic pain is a trauma pattern. Addressing it requires the same biological and nervous system literacy. That is what the Biology of Trauma® approach is built for.


Resources/Guides:


Related Podcast Episodes:


Your host: 

Dr. Aimie Apigian is a double board-certified physician in Preventive and Addiction Medicine, author of the national bestselling book The Biology of Trauma® (foreword by Gabor Maté) and the founder of the Biology of Trauma® framework that transforms our understanding of how the body experiences and holds trauma. She holds master's degrees in biochemistry and public health. After foster-adopting a child during medical school sparked her journey, she desperately sought for answers that would only continue as she developed chronic health issues. Through her Biology of Trauma® practitioner training, podcast, YouTube channel, and international speaking, Dr. Aimie bridges functional medicine, attachment science, and trauma therapy — with a focus on facilitating accelerated repair of trauma's impact on the mind, body, and biology.




Why Chronic Pain and Trauma Share the Same Biology — And What Your Nervous System Needs to Heal Both



There is a moment — and most people with chronic pain can identify it — when the pain stopped feeling like a physical problem and started feeling like a presence. Something that shows up unpredictably. Something that seems to worsen when life demands more than you have. Something that has its own logic, even if you can’t quite name what that logic is.


The biology behind chronic pain and trauma offers an explanation. And it starts with a threshold most people don’t know exists.


The Shared Biological Pattern of Chronic Pain and Trauma

Chronic pain and chronic trauma follow the same physiological pattern. Both become persistent when the nervous system crosses the critical line of overwhelm—the threshold at which the body shifts from manageable stress into survival strategies that block healing. Understanding this shared biology changes everything about how we approach both.


Acute pain makes biological sense. Tissue is injured. The nervous system signals threat. Inflammation arrives to begin repair. This is the body doing exactly what it is designed to do.


What turns acute pain into chronic pain follows the same sequence that turns acute stress into chronic trauma. The body reaches a specific physiological threshold — a critical line — where it no longer knows whether the threat is over. It does not reset. It stays braced.


That threshold is what the Biology of Trauma® framework calls the critical line of overwhelm.


Below this line, the body is in a stress response — sympathetic activation, adrenaline-fueled mobilization, the familiar experience of tension and urgency. Stress is not trauma. Stress is not what drives chronic pain. Stress is the body doing exactly what it is designed to do in the face of a manageable challenge.


The critical line is crossed when demand exceeds capacity. When the body perceives that the threat cannot be overcome through action. When — whether from a car accident, a phone call, a childhood memory triggered in the present moment, or years of accumulated relational pain — the nervous system concludes: this is not something I can move through. This is a life threat I cannot escape.


At that moment, the physiology changes entirely.

 

What the Body Does Past the Critical Line

Three survival strategies activate when the nervous system crosses the critical line of overwhelm: dissociation, immobilization (freeze), and energy conservation. Each is biologically adaptive. Each also actively interferes with the body’s capacity to heal chronic pain by redirecting resources away from repair and toward basic survival.


Three survival strategies activate when the nervous system crosses the critical line of overwhelm. Each one has a specific biological purpose. Each one also directly interferes with the body’s capacity to heal chronic pain.


•    Dissociation is the first. When present reality is intolerable, the nervous system creates distance from it. This shows up on a spectrum — from outright dissociation to the more common patterns of numbing, avoiding, and distracting. These are not character flaws. They are survival strategies.


•    Immobilization — the freeze response — is the second. Freeze has two distinct phases. The first is the classic “foot on the gas and brake simultaneously” — the body flooded with adrenaline but frozen in place, unable to act. The second is full shutdown: the nervous system removes its foot from the accelerator entirely. This is the dorsal vagal response, the state associated with collapse, dissociation, and exhaustion.


•    Energy conservation is the third, and it is perhaps the most directly relevant to chronic pain. In this state, the body allocates available energy to the single priority of survival. Healing, repair, detoxification, immune regulation, mitochondrial maintenance — all of it goes offline. The body cannot afford to direct resources toward recovery when it believes survival is still in question.


This is why chronic pain persists even when treatment addresses the tissue. The tissue heals. But the nervous system has not received the signal that the threat is over. The body remains in a state where healing is a secondary priority.


Why Adrenaline Matters More Than Most People Realize

During a stress response, adrenaline and endorphins naturally suppress pain—allowing the body to act under pressure. When the nervous system shifts into overwhelm, this pain suppression is withdrawn. The pain signal arrives full strength. This explains why people often report pain spikes after periods of high function, not during them.


One of the most counterintuitive aspects of chronic pain biology is the role of adrenaline. Most people with chronic pain know the feeling of having “pushed through” — the period of high function, high output, high tolerance that eventually leads to a significant flare. There is a direct biological mechanism at work.


During a stress response, the body naturally produces adrenaline and endorphins that suppress pain. This is the biology behind the runner’s high. The body does this deliberately — pain suppression is a feature of the mobilization response.


When the nervous system crosses into overwhelm, that mobilization chemistry is withdrawn. The body shifts away from adrenaline-driven activation and into the shutdown survival strategies. With the natural pain suppression removed, the pain signal arrives full strength.


People often experience this as “the stress making my pain worse.” What is actually happening is the transition from stress into overwhelm — and the removal of the body’s own pain-suppression system.


Understanding this distinction changes the clinical picture. The goal is not to eliminate stress. The goal is to build capacity — so that the nervous system can respond to stress without crossing into overwhelm.


What Is Neuroception, and Why Does It Control Pain Flares?

Neuroception is the nervous system’s continuous, subconscious process of scanning for safety or threat—a term developed by Dr. Stephen Porges in polyvagal theory. It operates below conscious awareness. When neuroception detects sufficient threat—even from memory or relational cues—the body shifts into a protective state that increases pain perception and reduces healing capacity.


Neuroception is a term developed by Dr. Stephen Porges as part of polyvagal theory. It describes the nervous system’s continuous, subconscious scanning for safety or threat. It operates entirely below conscious awareness — which is why pain flares can seem completely unpredictable, appearing even when, on the surface, everything appears to be fine.


Neuroception collects information from three sources: the internal state of the body, signals from the environment, and relational cues from other people. Based on that data, the nervous system determines which physiological state to activate.


•   When the nervous system dashboard reads safety: the body is in calm aliveness — ventral vagal, parasympathetic activation. In this state, the nervous system engages its full healing biology: immune regulation, tissue repair, detoxification, mitochondrial function.


•  When the nervous system dashboard reads threat: the body shifts toward protection. Healing goes offline. Pain signals increase. The nervous system is trying to keep the body alive, and pain is part of how it communicates urgency.


For people with a history of chronic stress or relational trauma, the neuroception system is often calibrated toward threat. The nervous system adapted. It learned — often in early childhood — to maintain a state of bracing because the environment was genuinely unsafe. That calibration does not automatically update when the environment changes. It requires deliberate, somatic experience to shift.


The Five Core Nervous System Skills

Building the capacity to stay below the critical line—and to return to it when crossed—depends on five core skills: feeling, state-shifting, pacing, tracking, and choosing. These are somatic competencies the nervous system learns through practice, not mindset shifts. Each one expands the window of tolerance before the body crosses into overwhelm.


Building capacity to stay below the critical line depends on five core skills. These are somatic competencies that the nervous system learns through practice. They are not mindset exercises.


1. Can I Feel?

Most people with chronic pain have learned, often beginning in childhood, to disconnect from body sensation. The body associates sensation with pain, and pain with threat. Reconnecting with the body’s internal experience — without being overwhelmed by it — is the first skill. It is also the foundation for all the others.


2. Can I Shift My State?

The nervous system has default pathways. When certain triggers arrive, the body moves automatically toward familiar responses — including pain flares. The capacity to notice a state and deliberately shift it is learnable. Without it, the body remains at the mercy of its established patterns.


3. Can I Pace?

Pain is information. It is information of overwhelm. When the pace of engagement — emotional, physical, relational — exceeds what the nervous system can process, the body signals through pain. The guiding principle here: we only go as fast as the slowest part of me feels safe to go. This honors the body’s wisdom without abandoning progress.


4. Can I Track?

Tracking means developing the ability to watch the nervous system in real time — to notice the early signals of approach toward the critical line, before it is crossed. Most people only notice they have crossed the line when they are already in a flare. Tracking creates the possibility of intervention before that point.


5. Can I Choose?

When tracking creates awareness, choosing becomes possible. The space between trigger and reaction expands. A pattern that once felt automatic becomes something the body can respond to differently. This is pattern interruption at the nervous system level. It develops over time, through practice.


A Body-Based Tool for the Overwhelm Threshold


When overwhelm is approaching, slowly extending the arms outward—hands to shoulders, then pressing to full extension as slowly as possible—creates physical space the nervous system interprets as safety. This simple somatic movement can pull the body back from the overwhelm threshold without visualization or narrative.


One somatic practice that is both accessible and effective involves creating physical space. When overwhelm is approaching, bring hands to the shoulders. Press outward as slowly as possible to full extension. Pause at extension until the body signals completion.


The nervous system interprets physical space as safety. Space creates permission to breathe, to think, to be. The movement itself is enough. No visualization required.

Posture also plays a role that is often underappreciated. The shame collapse — the instinctive curling forward to protect the abdomen and heart — is a direct biological response to overwhelm. The gut and heart are where the body most physically registers threat.


Trying to force an open posture in this state creates more physiological distress, not less. Placing a pillow, book, or blanket in front of the abdomen to provide protection allows the body to feel safe enough to gently open — working with the biology, not against it.


The Three Rs: A Framework for Chronic Pain as a Trauma Pattern


Chronic pain responds to the same biological framework used for trauma patterns: Recognize the pattern as adaptive biology, identify the underlying Reasons (biochemical imbalances, somatic memory, nervous system adaptations), and apply Repair tools at both the biological and nervous system levels. Addressing all three layers is what shifts the pattern at its root.


Chronic pain is a trauma pattern. That framing is not metaphorical — it is biological. Which means it responds to the same framework used to address trauma patterns in the body.


•    Recognize the pattern. The nervous system is doing what it learned to do when demand exceeded capacity. It is adapted — not disordered.


•    Identify the underlying Reasons. What biochemical imbalances have accumulated over years of cycling between stress and overwhelm? What implicit memories are being stored in somatic tissue? What parts of the system are maintaining the pain pattern because they have not yet received the attention and support they need? The reasons are always multiple.


•    Apply the Repair tools. Repair at the biological level — addressing nutrient depletion, neuroinflammation, mitochondrial function. Repair at the somatic level — building the five nervous system skills, creating new pathways. Repair at the relational and parts level — attending to the parts of the system that are maintaining the pain pattern because they have not yet received the signal that it is safe to let go.

 

This is the sequence. It is not linear. It is iterative. And it works at the root level — because it addresses not just the symptom of pain, but the biological conditions under which the body remains convinced the threat is still present.


FAQ


1. What is the critical line of overwhelm, and why does it matter for chronic pain?  The critical line of overwhelm is the biological threshold at which the nervous system shifts from a stress response to an overwhelm response. Below this line, the body remains in sympathetic activation with access to its own healing biology. Above it, three survival strategies activate — dissociation, immobilization, and energy conservation — each of which actively blocks tissue repair and nervous system regulation. Chronic pain lives consistently on the overwhelm side of this line. Understanding where your critical line sits — and what expands your capacity to stay below it — is the core clinical question in the Biology of Trauma® approach to chronic pain.


 

2. Why does adrenaline affect chronic pain levels?  During a stress response, the body naturally produces adrenaline and endorphins that suppress pain — the same mechanism behind the runner’s high. When the nervous system crosses into overwhelm, this mobilization chemistry is withdrawn. Without the body’s natural pain suppression, the full pain signal arrives. This is why many people experience pain spikes after periods of high function: the body was using adrenaline to suppress pain, and when that state ends, the pain becomes fully present.

 

3. What is neuroception and how does it cause chronic pain flares?  Neuroception is the nervous system’s continuous, subconscious process of scanning for safety or threat, described by Dr. Stephen Porges in polyvagal theory. It operates below conscious awareness, processing internal body signals, environmental cues, and relational information. When neuroception detects sufficient threat — even from memory, anticipation, or relational patterns — the body shifts into a protective physiological state that increases pain perception and reduces its healing capacity. This is why pain flares often seem unpredictable.

 

4. What are the five core nervous system skills for chronic pain?  The five core nervous system skills are: (1) Can I feel — the capacity to reconnect with body sensation without being overwhelmed; (2) Can I shift my state — moving deliberately from sympathetic activation toward calm aliveness; (3) Can I pace — moving only as fast as the slowest part of the system feels safe; (4) Can I track — noticing the approach of the critical line before it is crossed; and (5) Can I choose — inserting a deliberate response between trigger and reaction to interrupt established pain patterns.

 

5. Can chronic pain be addressed through nervous system work?  The Biology of Trauma® framework treats chronic pain as a trauma pattern — a biological state in which the nervous system has not completed a full reset to safety, keeping the body’s healing biology offline. Addressing it requires the Three Rs: Recognizing the pattern as biological adaptation, identifying the underlying Reasons (biochemical imbalances, somatic memory, parts holding the pattern), and applying Repair tools at both the biological and nervous system levels. Nervous system skill development is central to this approach.

 

6. What is the difference between stress and overwhelm in the body?  Stress is a sympathetic nervous system response — adrenaline-driven, mobilizing, purposeful. The body is designed to move through stress. Overwhelm is what happens after the critical line is crossed: the nervous system shifts to survival strategies including freeze, dissociation, and energy conservation. These strategies reduce the body’s capacity to heal and regulate. Stress does not cause chronic pain to flare. The transition into overwhelm does.

 

7. What is the role of microglia in chronic pain and trauma?  Microglia are neuron support cells responsible for pruning, nurturing, and protecting neurons. They are also the primary creators of neuroinflammation when activated. Like the nervous system itself, microglia can hold accumulated stress until they cross their own threshold — at which point they shift into sustained inflammatory activation. This contributes to central sensitization in chronic pain and parallels the critical line model: a system that functions within capacity until it doesn’t, at which point the biology changes entirely.



Helpful Research

1. Polyvagal Theory and Autonomic Nervous System Regulation — Porges, S.W. (2011). The Polyvagal Theory: Neurophysiological Foundations of Emotions, Attachment, Communication, and Self-regulation. W.W. Norton & Company. Foundational framework for understanding neuroception, autonomic state shifts, and the vagal pathways underlying the biological responses described in this episode.

2. Central Sensitization in Chronic Pain — Woolf, C.J. (2011). “Central sensitization: Implications for the diagnosis and treatment of pain.” Pain, 152(3 Suppl), S2–S15. Documents how the central nervous system amplifies pain signals in chronic pain states, a mechanism directly relevant to the overwhelm-driven pain loop described here.

3. Microglia and Neuroinflammation — Nimmerjahn, A., Kirchhoff, F., & Helmchen, F. (2005). “Resting microglial cells are highly dynamic surveillants of brain parenchyma in vivo.” Science, 308(5726), 1314–1318. Describes how microglia continuously survey neural tissue and activate inflammatory responses when their own threshold is crossed — paralleling the critical line model.

4. Energy Metabolism and Chronic Pain — Naviaux, R.K. (2014). “Metabolic features of the cell danger response.” Mitochondrion, 16, 7–17. Describes the Cell Danger Response — the metabolic shift in which cells prioritize defense over healing and repair. Directly supports the energy conservation survival strategy described in the Biology of Trauma®  framework.

5. Somatic Experiencing and Trauma Resolution — Levine, P.A. (2010). In an Unspoken Voice: How the Body Releases Trauma and Restores Goodness. North Atlantic Books. Foundational work on body-based trauma resolution, including freeze response completion and the role of somatic movement in nervous system regulation.



Disclaimer: By listening to this podcast, you agree not to use this podcast as medical, psychological, or mental health advice to treat any medical or psychological condition in yourself or others. This podcast is for informational and educational purposes only and does not constitute professional advice, diagnosis, or treatment. Always consult your own physician, therapist, psychiatrist, or other qualified health provider regarding any physical or mental health issues you may be experiencing.


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