Could the Way You Breathe Be Making Your Chronic Pain Worse?

TL;DR

Breathing is the most fundamental and most overlooked variable in chronic pain. Most people have heard of breathwork as a stress management tool. What almost no one has been told is the specific physiological chain through which dysfunctional breathing patterns directly produce low-grade oxygen deficits in tissue, deplete the minerals that regulate nerve and muscle function, activate the sympathetic nervous system, collapse the spinal cord's pain-filtering system, and lock the body into a self-reinforcing loop of pain, fear, and physiological dysfunction. This article covers all of it, why it happens, how it sustains itself, and what actually needs to change.

What Most Patients Are Told

If breathwork has come up in the context of your chronic pain at all, it has probably been framed one of two ways.

Either it was presented as a relaxation technique, something to take the edge off stress and maybe provide a small amount of symptomatic relief. Or it was not mentioned at all, because it did not seem relevant to whatever the structural or biochemical explanation for your pain happened to be.

In either case, the most important information was left out.

Breathing is not a relaxation strategy. It is the primary mechanism through which your body delivers oxygen to every tissue that depends on it to heal, to function, and to regulate pain. When that delivery system is working poorly, the downstream consequences include poor tissue healing, heightened nerve sensitivity, mineral depletion, sympathetic nervous system activation, and a collapse of the spinal cord's ability to filter out pain signals.

These are not mild quality-of-life effects. They are documented physiological mechanisms, and in chronic pain, they are almost certainly active and unaddressed.

Where The Conventional Explanation Breaks Down

Most conversations about breathing in a clinical context focus on oxygen saturation: the percentage of hemoglobin in the blood that is carrying oxygen. A pulse oximeter reading of 98 or 99 percent is considered normal and reassuring, and in most clinical encounters, it effectively closes the conversation about whether oxygen delivery is a problem.

But oxygen saturation measures how much oxygen is in the blood. It says nothing about how much oxygen is actually being released to the tissues that need it.

These are not the same thing, and the difference between them is one of the most important and least discussed mechanisms in chronic pain physiology.

Understanding why requires a brief explanation of how oxygen delivery actually works, and why the assumption that more breathing equals more oxygen to tissues is not just wrong but is in some cases making chronic pain worse.

Why We Actually Breathe: The Answer Changes Everything

Most people, if asked why they breathe, would say: to get oxygen. That is correct, but it is only half the answer, and the half that gets left out is the half that matters most for chronic pain.

The real reason we breathe is to produce ATP, the molecule that powers virtually every biological process in the body.

Inside almost every cell are structures called mitochondria. Their function is to take fuel from food and mix it with oxygen from the air to produce ATP. That is the complete transaction: food plus oxygen equals energy. Everything that requires energy in your body, tissue repair, nerve conduction, muscle contraction and relaxation, immune function, inflammation clearance, depends on this process.

Mitochondria do have a backup plan for when oxygen is not available. They can produce ATP without it. But this backup option generates significantly less energy, and it produces lactic acid as a byproduct, which is responsible for the burning, aching muscle sensation that follows intense exercise.

For chronic pain sufferers who experience that burning and aching as a baseline state, without having done any significant exercise to warrant it, this is not incidental. Mitochondrial dysfunction is a hallmark of most chronic pain conditions, and the reliance on the backup oxygen-free pathway is one of its most common expressions.

The tissues most vulnerable to even mild shortfalls in oxygen are nerves and muscles, specifically because they are some of the highest energy-consuming tissues in the body. Nerves are constantly firing. Muscles are constantly contracting, relaxing, and rebuilding. Both depend heavily on continuous ATP production, and both become dysfunctional and hypersensitive when that supply is even mildly compromised.

This is not about dramatic oxygen deprivation. It is about a low-grade, chronic deficit that builds slowly and invisibly, never triggering an obvious alarm, but consistently producing poor tissue healing, heightened nerve sensitivity, and pain.

As one concrete example: fibromyalgia tender points, when biopsied, consistently show lower concentrations of oxygen in the tissue compared to surrounding areas. The pain at those points is not arbitrary. It is the tissue signaling, in the only way it has available, that it is not getting what it needs.

The Part Nobody Explains: CO2 Is Not the Enemy

Here is where the physiology becomes counterintuitive, and where the most important correction to popular assumptions about breathing needs to happen.

When oxygen is absorbed into the bloodstream, it binds to hemoglobin inside red blood cells. Hemoglobin contains a protein called heme, which holds an iron atom, and that iron acts as a magnet, attracting and holding the oxygen molecule. The red blood cell then circulates throughout the body to deliver that oxygen to tissues that need it.

The question that rarely gets asked is: how does the red blood cell know where to release the oxygen?

The answer is carbon dioxide (CO2).

CO2 is produced by metabolically active tissues as a byproduct of energy production. Tissues working harder than others produce more of it. But it is not just a waste product. The body uses this CO2 wisely. CO2 is the cue for hemoglobin to drop off its oxygen. The higher the local CO2 concentration, the more oxygen passing red blood cells will release into the tissue.

This mechanism has a name: the Bohr effect.

When a person chronically overbreathes, typically through faster and shallower breaths, they may be moving the same volume of air through their lungs. But they are exhaling CO2 much faster than it is being produced. The concentration of CO2 in the body drops. Without adequate CO2, hemoglobin holds on to its oxygen more tightly. The oxygen circulates in the blood, the pulse oximeter reads normal, but the tissue does not receive it.

Breathing more does not mean more oxygen is reaching your tissues. In the context of dysfunctional breathing patterns, it frequently means the opposite.

There is a second component that compounds this. At a normal resting breathing rate, the lungs absorb only about a quarter of the oxygen present in each breath. Slower, deeper breaths give oxygen more time to diffuse across the lung surface and be picked up by red blood cells. Fewer, fuller breaths can yield meaningfully more oxygen absorption than more frequent, shallower ones.

The Mineral Problem: What Overbreathing Costs Your Nervous System

There is a third consequence of chronic overbreathing that is almost never discussed in clinical settings, and it is directly relevant to the nerve and muscle hypersensitivity that characterizes most chronic pain conditions.

When CO2 is exhaled in excess, the blood gradually shifts toward a more alkaline pH. The body's pH balance is tightly regulated, and the kidneys respond to the shift by buffering it back toward normal. The mechanism by which they do this involves excreting minerals: specifically magnesium, potassium, and phosphorus.

These are not insignificant minerals. Magnesium is the molecule that allows muscles to relax by displacing calcium from the calmodulin receptor. It is also a natural blocker of the NMDA receptor, the receptor whose chronic overactivation drives central sensitization. Potassium is essential for nerve cell repolarization, the reset mechanism that allows a nerve to fire again after it has transmitted a signal. Phosphorus is needed to make phosphate, which is the "P" in "ATP."

Chronic depletion of all three, driven by the ongoing mineral loss produced by overbreathing, creates a nervous system that is chemically primed for hyperexcitability: nerves that fire more easily than they should, muscles that cramp and spasm without obvious provocation, and a pain system that operates at a lower threshold than it was designed for.

For chronic pain sufferers who experience random cramping, twitching, or muscle spasm alongside their primary pain, dysfunctional breathing and its downstream mineral depletion are among the most overlooked contributing mechanisms.

The Anatomy of Dysfunctional Breathing: Why Pain Changes How You Breathe

The diaphragm is the primary muscle of breathing. It is a dome-shaped muscle that separates the chest cavity from the abdomen. When it contracts and flattens downward, it creates negative pressure in the chest that draws air into the lungs. When it relaxes and rises back up, it creates positive pressure that pushes air out.

Most adults, even in the absence of pain, use only about ten percent of the full range of motion their diaphragm is capable of.

When pain is added to the picture, this already limited range contracts further. Pain and anticipated pain both trigger muscular guarding: a protective, involuntary bracing through the abdomen, chest, shoulders, and neck. That guarding physically restricts the downward movement of the diaphragm. The body compensates by recruiting the accessory muscles of breathing, the muscles of the neck, upper chest, and between the ribs, to do more of the work.

The result is breathing that moves progressively higher and shallower into the chest, generating the exact pattern of faster, shorter breaths that exhales CO2 too rapidly, reduces tissue oxygen delivery, and depletes the minerals that regulate nerve and muscle function.

This is the mechanism by which pain produces a breathing pattern that makes pain worse.

How Chest Breathing Activates Your Fight-or-Flight System

The physiological consequence of this shift is more significant than most people realize, because the upper and lower regions of the lungs are innervated by different branches of the autonomic nervous system.

The upper lungs are innervated primarily by the sympathetic nervous system, the fight-or-flight branch. The lower lungs are innervated primarily by the parasympathetic nervous system, the rest-and-digest branch.

When breathing migrates upward into the chest, driven by pain-related muscular guarding and diaphragm restriction, sympathetic innervation dominates. The brain receives a physiological signal that the body is in a state of threat, regardless of whether any external threat is actually present. And it responds accordingly.

The first thing that happens is that descending inhibition falls. The spinal cord's pain-filtering system, the mechanism that prevents insignificant stimuli from reaching conscious pain awareness, weakens. More signals get through. Pain becomes more intense.

The second is a cortisol response. Cortisol mobilizes blood glucose to fuel the anticipated physical response to threat. When that physical response does not occur, because the threat is not a predator but a chronic physiological state, the elevated blood glucose sits unused. Over time this contributes to insulin resistance, advanced glycation end products, and chronic inflammation: all of which feed back into the pain system through the mechanisms covered in previous articles in this series.

The loop is now complete. Pain causes muscular guarding. Guarding restricts the diaphragm. Restricted diaphragm shifts breathing upward. Chest breathing activates the sympathetic nervous system. Sympathetic activation weakens descending inhibition and raises cortisol. More pain gets through and chronic inflammation increases. Which causes more muscular guarding.

At no point does this cycle require an external trigger to keep running.

The Fear Component: Why Your Amygdala Is Part of This

There is one more layer to this that ties the physiological loop to the emotional experience of chronic pain, and it is the layer that makes breathwork something entirely different from a relaxation technique.

Fear, anxiety, and catastrophizing thoughts around pain are not psychological weaknesses. They are documented physiological drivers of chronic pain, operating through shared brain structures. There are 44 brain regions involved in pain processing. A significant number of them are also involved in the fear response and emotional learning. To the brain, pain and fear are not separate experiences. They are the same experience, processed through overlapping brain structures.

The amygdala is one of those structures. It processes emotions, controls the fear response, is involved in emotional memories, and it is also involved in regulating aspects of breathing. This connection is the key to understanding why breathwork is not just about calming down.

When CO2 tolerance is trained, meaning when the body becomes accustomed to holding higher concentrations of CO2 without triggering a panic response, the amygdala becomes measurably less reactive. Its threshold for generating a fear signal rises. And because the same structures that process fear also regulate pain, a less reactive amygdala means a nervous system that is less prone to amplifying pain signals in response to perceived threat.

This is not a metaphor. It is a neurological mechanism. Training CO2 tolerance through breathing practice directly alters the reactivity of a brain structure that sits at the intersection of pain, fear, and the descending inhibition system.

It is also the explanation for why fear of pain and pain itself are so difficult to separate in chronic pain conditions. Every time a movement causes pain, the amygdala encodes that association. The next time that movement is anticipated, the amygdala activates, descending inhibition falls, and pain is amplified before the movement even occurs. The fear is not creating pain from nothing. It is triggering the same physiological cascade that any other threat would trigger, through the same neurological structures.

What Functional Breathing Actually Looks Like

The foundation is nasal breathing. The nose is the primary breathing orifice. The mouth is a backup system. Breathing through the nose warms and moistens incoming air, improving oxygen absorption at the lung surface. The nasal passages are also lined with erectile tissue that, when stimulated by airflow, releases nitric oxide, a vasodilator that opens blood vessels and improves oxygen delivery to the tissues that need it most.

The research on breathing rate points consistently to approximately 5.5 seconds of inhalation and 5.5 seconds of exhalation as the range associated with optimal physiological benefit. The breath should be smooth throughout, not front-loaded. The goal is even, consistent airflow rather than a large initial push followed by a slow taper.

Diaphragmatic engagement can be self-assessed by placing one hand on the chest and one on the abdomen. With a healthy breathing pattern, the abdomen should rise with each inhale and fall with each exhale, with minimal movement in the chest. If the chest hand moves more than the abdomen hand, accessory muscle use is dominant and diaphragmatic engagement is limited.

The most common mistake in approaching breathwork for chronic pain is treating it as a formal daily practice that requires a dedicated time block. Short, frequent redirections of attention to breathing throughout the day produce more consistent physiological benefit than a single extended session once a week. Two to three minutes of deliberate, nasal, diaphragmatic breathing several times a day is more effective than thirty minutes once a week.

The second most common mistake is treating it as a rescue technique for acute symptom spikes. Its primary value in chronic pain is not short-term relief. It is the gradual, cumulative lowering of the pain threshold through improved oxygen delivery, restored mineral balance, reduced sympathetic dominance, and decreased amygdala reactivity over time.

The results are not always immediate. They are consistent and progressive when the practice is consistent.

The Bottom Line

Breathwork is not a soft supplement to real chronic pain treatment.

It is one of the most direct available interventions on tissue oxygenation, mineral balance, sympathetic nervous system activation, descending inhibition, and amygdala reactivity, which are five of the most important physiological variables determining how much pain you experience every day.

The way you are breathing right now is either contributing to your chronic pain or working against it, and that is something you can begin to change immediately.

Written By:

Dr. Jason Winkelmann

Naturopathic doctor, Chiropractor, Chronic Pain Specialist, and Educator

Frequently Asked Questions

My oxygen levels always come back normal on the pulse oximeter. Does that mean my oxygen delivery is fine?

No, and this is one of the most important distinctions in this entire article. Pulse oximetry measures the percentage of hemoglobin in the blood that is carrying oxygen. It does not measure how much of that oxygen is being released to the tissues. Due to the Bohr effect, hemoglobin requires adequate CO2 levels to release its oxygen at the tissue level. A person with normal blood oxygen saturation who is chronically overbreathing can have well-oxygenated blood and oxygen-deficient tissue simultaneously. The pulse oximeter cannot detect this distinction.

Is overbreathing the same as hyperventilation?

Hyperventilation is the acute, dramatic version: rapid, panicked breathing that produces noticeable symptoms like dizziness, tingling, and shortness of breath. Chronic overbreathing is a much subtler pattern: habitually breathing slightly faster and shallower than optimal, often completely below the threshold of conscious awareness. It does not feel like hyperventilation. It feels like normal breathing. But over time, its effects on CO2 levels, mineral balance, sympathetic tone, and tissue oxygenation are physiologically significant and cumulative.

Why would pain cause me to breathe differently if I am not consciously aware of it?

Muscular guarding is an involuntary response, meaning the nervous system triggers it without conscious instruction. When the body anticipates or experiences pain, it braces: the abdominal and chest wall muscles tighten to protect the area. This bracing physically restricts the downward excursion of the diaphragm, forcing the body to compensate by recruiting the accessory muscles of the neck and upper chest. The shift in breathing pattern follows automatically and unconsciously. Over time, as guarding becomes habitual in response to chronic pain, the dysfunctional breathing pattern it produces becomes the new baseline, and the physiological consequences of that pattern accumulate.

How does CO2 tolerance training affect pain if CO2 is just a waste product?

CO2 is not a waste product in the functional sense, and this misunderstanding is at the root of why breathing physiology is so consistently underestimated. CO2 is the primary signal that triggers hemoglobin to release oxygen at the tissue level. It also has direct effects on the nervous system through its relationship with the amygdala. Training CO2 tolerance, becoming comfortable with higher concentrations of CO2 in the body rather than immediately expelling it, reduces amygdala reactivity, improves tissue oxygen delivery, helps maintain blood pH without the mineral-depleting buffering response, and over time reduces the physiological burden the nervous system is carrying. All of these have documented downstream effects on pain threshold.

How long before breathing changes produce noticeable improvements in chronic pain?

This varies considerably based on how deeply dysfunctional the breathing pattern is, how many of the downstream mechanisms (mineral depletion, sympathetic dominance, amygdala reactivity) have had time to become established, and how consistently the practice is maintained. Some people notice changes in sympathetic tone and acute pain intensity relatively quickly, within days to weeks of consistent practice. The deeper physiological changes, restored mineral balance, improved tissue oxygenation, reduced amygdala reactivity, and lowered baseline pain threshold, are cumulative and typically become apparent over weeks to months. The important framing is that this is not a rescue technique producing immediate relief. It is a physiological recalibration that produces durable results proportionate to the consistency of the practice.