When Stress Drives Inflammation: Why Chronic Inflammation Isn't Just About Diet
- Dr Anupa Dharamsi
- Mar 11
- 11 min read
By Dr. Anupa Dharamsi, Chiropractor | Handcrafted Chiropractic, Māngere, Auckland Nervous system-focused chiropractic care | ACC & WINZ welcome
If You've Tried Everything and Your Body Still Feels Inflamed
You've cleaned up your diet. Cut out the processed food, increased the vegetables, started taking omega-3s. Maybe you've even gone gluten-free, or dairy-free, or tried an elimination protocol.
And things improved — a little, for a while.
But the stiffness keeps returning. The fatigue hasn't fully lifted. The aches that don't have an obvious cause keep showing up. Your body still feels like it's running hot, even when you're doing everything right.
This is one of the most common and most frustrating patterns I see in clinic. And the explanation almost always comes back to the same place: the nervous system.
Inflammation is not only a nutrition problem. It is also — and often primarily — a regulation problem. And until the nervous system piece is addressed, even excellent nutrition and lifestyle habits can only take the body so far.
This post explains why.
Inflammation Is Not the Enemy
Before we talk about what drives chronic inflammation, it's worth reframing the relationship with inflammation itself.
Inflammation gets a bad reputation in modern health conversations — spoken about as though it's always harmful, always to be suppressed. But it is one of the body's most intelligent and essential processes.
When you cut your finger, twist an ankle, or catch a virus, the immune system activates almost immediately. Blood flow increases to the affected area. Immune cells arrive to remove damaged tissue and fight infection. Chemical messengers coordinate the repair sequence. This is called acute inflammation — and it is temporary, targeted, and absolutely necessary for healing.
The problem arises when inflammation doesn't switch off properly. Instead of appearing briefly and purposefully, inflammatory activity lingers in the background at a low but persistent level. Scientists call this chronic low-grade inflammation — and over the past few decades, research has linked it to a wide range of conditions: cardiovascular disease, type 2 diabetes, autoimmune disorders, neurodegenerative disease, depression, and many chronic pain conditions.
Often, this inflammation is subtle. Blood tests may still fall within normal ranges. Symptoms appear gradually — a persistent ache here, a bout of fatigue there, a sleep quality that's never quite right. Yet the body is operating under a continuous inflammatory load.
Which raises an important question: why would the body stay in a defensive state when there is no obvious injury or infection?
Diet and lifestyle play a role. But the deeper driver — the one that explains why diet alone often
isn't enough — is the nervous system.
The Nervous System and the Immune System Are Always in Conversation
The immune system does not operate independently from the brain and nervous system. These systems are deeply, continuously connected through what researchers call the neuro-immune network — a communication architecture that allows the body to coordinate defence and repair rapidly.
When the brain perceives danger — whether physical injury, infection, or sustained environmental stress — it sends signals that prepare the immune system to respond. Part of that response involves inflammation. Immune cells communicate using chemical messengers called cytokines, which help
determine when immune cells activate, where they travel, and how intense the response should be.
Under normal circumstances, this is brilliantly adaptive. The nervous system reads the environment. The immune system responds accordingly. When the threat passes, the system settles.
The breakdown happens when the nervous system doesn't get to settle.
If the brain is reading the environment as persistently threatening — whether due to chronic work stress, financial pressure, disrupted sleep, old trauma held in the body, or simply years of accumulated demand — the immune system receives a sustained signal to stay partially activated. Inflammation becomes part of the body's background operating state. Not because there is injury or infection. Because the nervous system believes the body still needs to be ready to defend.
I see this weekly in clinic. People who are well-nourished, who exercise, who are genuinely trying to take care of themselves — and whose bodies are still carrying a level of tension and inflammatory reactivity that doesn't match their outward circumstances. The body is doing exactly what a chronically stressed nervous system tells it to do.
The Biology: Why Stress Keeps Inflammation Active
These patterns are not just clinical observations — they are supported by measurable biological mechanisms.
Central to the story is a molecule called NF-κB — a master switch for inflammation genes. When NF-κB is activated, it increases the production of inflammatory molecules including IL-6 and TNF-alpha, two of the primary drivers of systemic inflammatory signalling. Research consistently shows that chronic psychological and physiological stress increases activity in this pathway.
At the same time, chronic stress undermines the body's ability to switch inflammation off. Cortisol — the primary stress hormone — normally plays a regulatory role in immune activity, helping to modulate inflammatory responses after they've served their purpose. But when cortisol levels remain chronically elevated, immune cells can become less responsive to its signals. Scientists call this glucocorticoid resistance — the body, essentially, becomes desensitised to its own braking mechanism.
The result is a system where inflammation activates readily and resolves slowly. The accelerator is sensitive; the brakes are worn down.
This field — psychoneuroimmunology, the study of how the brain, nervous system, and immune system interact — has produced decades of consistent findings: people under chronic stress show higher baseline inflammatory markers, slower immune recovery, and greater susceptibility to both infection and chronic inflammatory conditions. The immune system is not just responding to what's in the body. It's responding to what the nervous system is telling it about the environment.
The Vagus Nerve: Your Body's Built-In Anti-Inflammatory Brake
If the sympathetic nervous system is the accelerator — activating the stress response, priming the immune system for defence — the parasympathetic nervous system is the brake. And its most important pathway is the vagus nerve.
The vagus nerve is the longest cranial nerve in the body, connecting the brain with the heart, lungs, digestive organs, and key components of the immune system. Among its many roles, it carries a pathway scientists call the cholinergic anti-inflammatory pathway — a direct neural route through which the brain can reduce excessive inflammatory responses.
When vagal tone is strong and vagal signalling is healthy, this pathway actively moderates inflammation. Immune cells receive signals to produce fewer inflammatory cytokines. The body shifts away from defence and toward recovery and repair. When vagal tone is low — which is common in people under chronic stress, with disrupted sleep, or with spinal tension affecting brainstem and cervical function — this regulatory brake weakens. Inflammation can persist longer and more intensely than the situation warrants.
"Your nervous system has a built-in anti-inflammatory brake. It runs through the vagus nerve — and chronic stress, poor sleep, and spinal tension can all weaken it."
This is one of the reasons practices that support nervous system regulation — restorative sleep, breathwork, movement, and hands-on structural care — can influence inflammatory patterns in ways that diet alone cannot reach.
A Pattern I See Regularly
There's a common story I hear in clinic that I want to describe, because it captures this pattern clearly.
Someone comes in — often having tried quite a few things already. They've improved their diet significantly. They're exercising consistently. They take a range of supplements. They know stress is a factor and they're managing it as best they can.
And yet: their neck and shoulders lock up easily. Sleep is light or broken. Recovery from training takes longer than it should. Small inflammatory episodes — a flare of joint pain, a bout of digestive upset, a cold that lingers — keep appearing. From the outside, nothing obvious looks wrong. But the body is behaving like a system that's still on high alert.
What we often find is that the nervous system has been running in a protective mode for so long that the body has adapted to that state. Muscle tension has become baseline. Inflammatory signalling has become part of the background physiology. Sleep quality has degraded quietly over months or years.
The body isn't malfunctioning. It's functioning exactly as a chronically stressed nervous system would direct it to. The problem is that the nervous system hasn't had the opportunity — or the right input — to shift.
This is where addressing the regulatory state of the nervous system, rather than just the downstream symptoms, changes the trajectory of care.
Why Diet Alone Sometimes Isn't Enough
Nutrition absolutely matters for inflammation. Omega-3 fatty acids, polyphenol-rich plant foods, fibre, and micronutrients like magnesium and vitamin C all support anti-inflammatory pathways. Highly processed foods, excess refined sugar, and poor gut microbiome diversity drive inflammation upward. This is well-established science and worth taking seriously.
But food is one input into a complex biological system. The nervous system governs the mode the system operates in — and if the brain is reading the environment as persistently threatening, inflammatory signalling can remain elevated regardless of nutritional quality.
Think of it this way: nutrition influences the fuel. The nervous system influences which gear the engine is running in. You can put premium fuel in a car that's stuck in first gear — and it still won't run efficiently.
When people make genuine dietary improvements and still find themselves inflamed, fatigued, or slow to recover, the most important question isn't what else can I eat? It's why is my system still in a defensive mode?
The answer often involves sleep quality, chronic stress load, the physical state of the nervous system, and — specifically — the quality of sensory signalling from the spine to the brain. You can read more about how this connects to recovery and chronic pain in Why Your Pain Keeps Coming Back and How Your Nervous System Regulates Healing.
Signs Your Nervous System May Be Driving the Pattern
When the nervous system remains in a prolonged protective state, certain patterns tend to emerge together. People often describe:
Persistent tension in the neck, shoulders, or jaw — particularly worsening with stress
Difficulty fully switching off mentally, even when the body is tired
Light, fragmented, or unrefreshing sleep
Slow recovery from exercise, illness, or periods of high demand
Recurring inflammatory episodes — joint flares, gut symptoms, headaches — without an obvious external trigger
Fatigue that doesn't match actual workload
A general sense of the body being reactive or "on edge"
These are not signs of structural failure. They are signs of a system that has been in a high-alert state for long enough that vigilance has become the default. The body is working — but it's working very hard to maintain a defensive posture that is no longer serving it.
Recognising this pattern is the first step toward addressing it at the right level.
Not sure how your nervous system is currently functioning? Take our free 2-minute Nervous System Quiz — it's a useful starting point.
How Structural Care Supports Nervous System Regulation
The nervous system constantly receives sensory information from the body — from joint movement, muscle tone, fascial tension, and postural balance. These signals help the brain continuously update its understanding of the body and the environment. When those signals are clear, precise, and indicative of a body that can move freely and safely, the brain is more able to shift out of a defensive posture.
When spinal joints are restricted — through injury, accumulated tension, repetitive strain, or the physical expression of chronic stress — the quality of sensory information travelling from the spine to the brain degrades. The nervous system receives a noisier, less precise signal. And a brain working with imprecise sensory input tends to interpret the body as less safe than it actually is, maintaining the protective state even when the original threat has long since passed.
Chiropractic adjustments work at this level. By restoring movement to restricted joints and improving the quality of spinal sensory input, they help shift the information the brain is receiving about the body. Over a course of care, the nervous system receives accumulating evidence that movement is possible, the body is capable, and the system no longer needs to operate on high alert.
As regulation improves, the downstream effects often follow: sleep deepens, muscle tension decreases, recovery becomes more efficient, and inflammatory patterns begin to settle. Not because something was suppressed from the outside — but because the system is no longer stuck in defence.
You can read more about how this relates to immune function in Why Your Immune System May Not Be Working at Full Capacity and how nutritional support complements this process in Magnesium: The Mineral Your Nervous System Is Quietly Asking For.
Helping the Body Shift From Protection to Repair
Healing rarely depends on a single intervention. It emerges when the body has the right conditions to regulate itself effectively — and those conditions are rarely found in one place.
Consistent, restorative sleep. Regular movement that the nervous system interprets as safe. Nutrient-dense food that supports anti-inflammatory physiology. Meaningful rest and connection. A manageable stress load, or a nervous system with enough capacity to absorb what cannot be changed. And, often, structural care that improves the quality of signalling between body and brain.
When these conditions come together, the nervous system gradually perceives the environment as safer. The immune system follows. Inflammation becomes responsive and appropriate rather than chronically elevated. The body's natural repair capacity works more efficiently.
This is what it looks like when a body moves from protection back toward repair. Not a dramatic shift — but a slow, steady return to a system that trusts itself again.
When the nervous system shifts out of constant defence, the body often remembers something remarkable — how to heal.
Frequently Asked Questions
Can chiropractic care actually reduce inflammation? Not directly — chiropractic doesn't suppress inflammation the way medication does. What it does is support the nervous system's capacity to regulate inflammation more effectively. By improving spinal joint function and the quality of sensory signalling to the brain, chiropractic care can help shift the nervous system out of the chronic protective state that keeps inflammatory pathways activated. The vagus nerve — which runs through the cervical spine and brainstem — plays a particularly important role here. As vagal tone improves, the cholinergic anti-inflammatory pathway becomes more active.
I've changed my diet and I'm still inflamed. What am I missing? This is one of the most common questions in clinic. Diet influences the fuel and raw materials the body works with — but the nervous system governs the mode the body operates in. If the nervous system is still reading the environment as threatening, inflammatory signalling can remain elevated regardless of nutritional improvements. The missing piece is usually nervous system regulation — and that requires addressing sleep quality, chronic stress load, and often the physical state of the spine and nervous system.
What is glucocorticoid resistance and why does it matter? Cortisol normally plays a regulatory role in inflammation — it helps switch the immune response off once it's served its purpose. Glucocorticoid resistance develops when immune cells become less responsive to cortisol's signals after prolonged exposure to elevated cortisol levels. The result is that the body's natural braking mechanism for inflammation becomes less effective — inflammation activates readily but resolves slowly. This is a measurable biological consequence of chronic stress and is one of the key mechanisms linking sustained psychological pressure to persistent physical inflammation.
Does stress really cause physical inflammation, or is that just a figure of speech? It's a measurable biological reality. Chronic stress activates NF-κB — a master switch for inflammation genes — increasing the production of inflammatory cytokines including IL-6 and TNF-alpha. This is well-documented in psychoneuroimmunology research. People under chronic stress consistently show higher baseline inflammatory markers compared with those under lower stress loads. The connection between psychological stress and physical inflammation is not metaphorical; it is physiological and biochemical.
How long does it take for the nervous system to shift out of a chronic inflammatory pattern? It depends significantly on how long the pattern has been in place and what's maintaining it. Some people notice meaningful changes — better sleep, reduced reactivity, less frequent inflammatory episodes — within a few weeks of consistent care and lifestyle support. For long-standing patterns, several months of consistent effort is a more realistic expectation. The nervous system is genuinely adaptable at any age; what it requires is consistent input and the right conditions over time.
Ready to Address the Root, Not Just the Result?
If you've been managing chronic inflammation, recurring pain, or a body that never quite feels like it's recovering — and you've already tried the dietary approach — it might be time to look at what the nervous system is carrying.
At Handcrafted Chiropractic in Māngere, we work with people across South Auckland — Māngere, Māngere Bridge, Ōtāhuhu, Māngere East — who are ready to move beyond managing symptoms toward understanding what's actually driving them. ACC and WINZ welcome.
Not quite ready? Take our free Nervous System Quiz — 2 minutes to get a clearer picture of how your system is currently functioning.
Dr. Anupa Dharamsi is the founder and lead chiropractor at Handcrafted Chiropractic, a nervous-system-focused, trauma-informed practice in Māngere, Auckland. She works with patients experiencing chronic inflammation, recurring pain, and stress-driven health patterns — addressing the regulatory root rather than managing symptoms alone. ACC & WINZ welcome.
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