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# Inflammation

in·flam·ma·tion - in-fluh-MAY-shun

## Definition

Inflammation is the body's natural [immune response](/glossary/immune-response) to injury, infection, or irritation. When tissue is damaged - whether by a cut, a bacterial invasion, a sprained ankle, or a chemical irritant - the immune system triggers an inflammatory response to protect the body and begin the healing process. This acute inflammation is characterized by redness, swelling, warmth, pain, and sometimes loss of function in the affected area.

Acute inflammation is a healthy, essential process. Without it, wounds would never heal and infections would run unchecked. The problem arises when inflammation becomes chronic - persisting for weeks, months, or years even in the absence of an acute threat. Chronic [low-grade inflammation](/glossary/chronic-inflammation), driven by factors like poor diet, obesity, stress, inadequate sleep, smoking, and sedentary behavior, damages healthy tissues and is increasingly recognized as a driver of virtually every major chronic disease.

Chronic inflammation has been linked to heart disease, cancer, [type 2 diabetes](/conditions/type-2-diabetes), Alzheimer's disease, autoimmune conditions, depression, and accelerated aging. Unlike acute inflammation, which produces obvious symptoms, chronic inflammation is often "silent" - producing no obvious external signs while quietly damaging tissues from within. Blood markers like C-reactive protein (CRP) and interleukin-6 (IL-6) can help detect chronic inflammation.

## Key Facts

-   • Acute inflammation is a healthy healing response; chronic inflammation is a disease driver. 
-   • The cardinal signs of acute inflammation are redness, heat, swelling, pain, and loss of function - described by Roman physicians 2,000 years ago. 
-   • Chronic low-grade inflammation is sometimes called 'inflammaging' for its role in age-related disease. 
-   • Anti-inflammatory diets rich in omega-3 fatty acids, polyphenols, and fiber can measurably reduce inflammatory markers. 
-   • NSAIDs (ibuprofen, naproxen) work by blocking enzymes (COX-1 and COX-2) involved in the inflammatory process. 
-   • Regular moderate exercise has potent anti-inflammatory effects, reducing CRP levels by 20-30%. 

## How It Relates To Your Health

Understanding the difference between acute and [chronic inflammation](/glossary/chronic-inflammation) is fundamental to understanding modern disease. If your doctor [has](/glossary/hyaluronic-acid) mentioned elevated inflammatory markers, or if you have conditions like arthritis, heart disease, diabetes, or autoimmune disease, inflammation is likely playing a central role in your health picture.

The most effective anti-inflammatory strategies are lifestyle-based: following an anti-inflammatory diet (such as the Mediterranean diet), maintaining regular physical activity, achieving adequate sleep, managing stress, maintaining a healthy weight, and not smoking. These interventions collectively have a powerful impact on [systemic inflammation](/glossary/systemic-inflammation) and overall disease risk.

## Related Terms

[Cytokines](/glossary/cytokines)[Autoimmune Response](/glossary/autoimmune-response)[Atherosclerosis](/glossary/atherosclerosis)[Cortisol](/glossary/cortisol)

## Related Conditions

[

### Crohn's Disease

Digestive 

Crohn's disease is a type of inflammatory bowel disease that causes chronic inflammation anywhere in the digestive tract, most commonly the end of the small intestine. It can penetrate deep into bowel tissue and lead to serious complications including strictures and fistulas.

Persistent diarrhea Abdominal pain and cramping Blood in stool 

Chronic Learn More 

](/conditions/crohns-disease)[

### Asthma

Respiratory 

Asthma is a chronic respiratory condition in which the airways become inflamed and narrowed, making breathing difficult. Triggers like allergens, exercise, cold air, or respiratory infections can cause flare-ups (asthma attacks) with coughing, wheezing, and chest tightness.

Wheezing Shortness of breath Chest tightness 

Chronic Learn More 

](/conditions/asthma)[

### Osteoarthritis

Musculoskeletal 

Osteoarthritis is the most common form of arthritis, occurring when the protective cartilage that cushions the ends of bones gradually wears down over time. This causes pain, stiffness, and reduced mobility, most often in the knees, hips, hands, and spine.

Joint pain during or after movement Joint stiffness after rest Loss of flexibility 

Chronic Learn More 

](/conditions/osteoarthritis)[

### Fibromyalgia

Musculoskeletal 

Fibromyalgia is a chronic condition characterized by widespread musculoskeletal pain, fatigue, and tenderness, often accompanied by sleep problems, memory issues, and mood disturbances. Researchers believe it amplifies painful sensations by affecting the way the brain processes pain signals.

Widespread body pain Chronic fatigue Cognitive difficulties (fibro fog) 

Chronic Learn More 

](/conditions/fibromyalgia)

## Related Articles

[![The Mediterranean Diet: A Complete Beginner's Guide](https://images.unsplash.com/photo-1498837167922-ddd27525d352?w=1200&h=630&fit=crop&fm=webp)](/nutrition/mediterranean-diet-beginners-guide)

[](/nutrition/mediterranean-diet-beginners-guide)[Nutrition & Diet](/nutrition)

### The Mediterranean Diet: A Complete Beginner's Guide

2026-01-20

[![The Science Behind Cold Plunge Therapy](https://images.unsplash.com/photo-1544367567-0f2fcb009e0b?w=1200&h=630&fit=crop&fm=webp)](/wellness/science-behind-cold-plunge)

[](/wellness/science-behind-cold-plunge)[Wellness](/wellness)

### The Science Behind Cold Plunge Therapy

2026-02-12

## Sources

1.  [Understanding Inflammation](https://www.health.harvard.edu/staying-healthy/understanding-acute-and-chronic-inflammation) - Harvard Health Publishing
2.  [Chronic Inflammation](https://www.ncbi.nlm.nih.gov/books/NBK493173/) - StatPearls / PubMed
3.  [Inflammation: What Is It, Causes, Symptoms & Treatment](https://my.clevelandclinic.org/health/symptoms/21660-inflammation) - Cleveland Clinic

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