Chronic inflammation is a low-grade immune response that persists over time. Unlike acute inflammation, it does not come with redness, swelling, heat and pain — it runs quietly in the background for years. And because there are no obvious symptoms, most people only find out it has been there all along when a health check shows an elevated inflammatory marker.
What is chronic inflammation, and how does it differ from acute inflammation?
Acute inflammation is the body's repair mechanism: when you are injured or infected the immune system mobilizes quickly, finishes the job and stands down, usually within a few days to two weeks. Chronic inflammation is that same mechanism failing to wrap up properly and continuing to run at low intensity.
| Acute inflammation | Chronic inflammation | |
|---|---|---|
| Duration | Days to two weeks | Months to years |
| How it feels | Red, swollen, hot, painful — unmistakable | Almost nothing |
| Purpose | Repair and defense | A mechanism that never wrapped up |
| How it is found | You know it yourself | Mostly through marker testing |
What signals does chronic inflammation produce?
Its signals are all non-specific, which is precisely why it gets overlooked:
- Persistent tiredness: still tired after a full night's sleep, and a holiday does not fix it
- Brain fog and poorer concentration: thinking feels sticky, words go missing
- Dull aching in joints or muscles: hard to pinpoint, comes and goes
- Unsettled digestion: bloating, changes in bowel rhythm
- Recurring skin problems: redness, itching, flare-ups
- Poorer sleep quality: you fall asleep but wake unrefreshed
Taken one at a time, each can be put down to "being a bit run down lately". But when three or four are present together and persist for months, it is worth checking your inflammatory markers.
Does inflammation cause a fever?
Chronic inflammation usually does not cause fever. Fever is part of the acute response — the body raising its temperature to fight infection. Chronic inflammation runs at a far lower intensity, not enough to trigger thermoregulation, so body temperature is usually normal. That is one more reason it is so hard to notice: no single symptom is ever bad enough to send you to a doctor.
Common sources of chronic inflammation
- Dietary pattern: an imbalanced omega-6 to omega-3 ratio, high refined sugar intake
- Visceral fat: fat cells themselves secrete inflammatory signaling molecules
- Gut barrier status: when barrier function declines, the load on the immune system keeps rising
- Chronic stress and insufficient sleep: these affect cortisol rhythm, and with it immune regulation
- Environmental exposure: air pollution, environmental hormones, mycotoxins and other persistent burdens
The defining feature of chronic inflammation is that you cannot feel it, which makes self-assessment all but impossible. Confirming whether it is present, and how far it has gone, requires actual inflammatory markers alongside related metabolic and nutritional data.
See which systems the 136 markers cover →Which markers show chronic inflammation?
| Marker | What it reflects |
|---|---|
| hsCRP (high-sensitivity C-reactive protein) | The most widely used systemic inflammatory marker, more sensitive than standard CRP |
| Cytokines such as IL-6 | How active immune signaling is |
| Oxidized LDL | Related to inflammatory changes in the vascular endothelium |
| Red blood cell membrane fatty acid ratio | Reflects your actual omega-3 to omega-6 balance |
| HbA1c and insulin | The metabolic side and inflammation move together |
A basic health check panel usually includes only standard CRP, which is not sensitive enough to reveal low-grade chronic change.
How can you adjust?
🍽️ Eat
- Eat oily fish more often to shift the omega-6/omega-3 ratio
- Cut refined sugar and processed foods — the single change with the largest effect
- Eat a wider range of colorful vegetables and fruit for a broader spread of phytochemicals
🏃 Move and sleep
- Regular low-to-moderate intensity exercise is associated with falling inflammatory markers; overtraining, by contrast, pushes them up
- Insufficient sleep directly affects immune regulation, and this one is routinely underrated
🧪 Find the source
If you have adjusted your lifestyle and the markers remain elevated, there is usually an ongoing source of burden — the gut barrier, environmental toxins or an underlying infection — and it needs to be found with data rather than guessed at.
Frequently asked questions
What is chronic inflammation?
Chronic inflammation is a low-grade immune response that persists over time. Unlike acute inflammation it does not produce redness, swelling, heat and pain; it runs quietly in the background for months or even years. Because there are no obvious symptoms, most people only discover it through testing.
What are the symptoms of chronic inflammation?
Common ones are persistent tiredness, brain fog, dull aching in joints or muscles, unsettled digestion, recurring skin problems and poorer sleep quality. All of these are non-specific, and taken individually they are easily put down to stress or lack of sleep.
Does inflammation cause a fever?
Chronic inflammation usually does not cause fever. Fever belongs to the acute response, where the body raises its temperature to fight infection; chronic inflammation is not intense enough to trigger thermoregulation, so temperature is usually normal.
What should I test for chronic inflammation?
The most widely used is hsCRP (high-sensitivity C-reactive protein). For a fuller picture, cytokines such as IL-6, oxidized LDL, red blood cell membrane fatty acid ratio, HbA1c and insulin are also included.
Can chronic inflammation be changed?
Research has observed that dietary adjustment (more omega-3, less refined sugar), regular low-to-moderate intensity exercise and sufficient sleep are all associated with falling inflammatory markers. The key is having data for before-and-after comparison, so you know whether the direction is right.
Tired, foggy, unrefreshed by sleep — and no one can tell you why?
The defining feature of chronic inflammation is that you cannot feel it; only data makes it visible.
Body Decode, 136 markers, covers 17 health categories including immunity and inflammation, metabolic and nutrients, with a 60-minute consultant report review and a 120-day action plan.
