Anti-Inflammatory Diet and Chronic Muscle Pain: An Introduction
According to the World Health Organisation (WHO), approximately 1.71 billion people worldwide were affected by musculoskeletal conditions in 2019, including chronic muscle pain, arthritis, and injuries.
While physical therapy is usually the first-line treatment for muscle pain, it is equally important to take care of our bodies to support recovery, including managing stress, sleep, and nutrition.
In this post, we are going to discuss how chronic inflammation in the body affects muscle recovery and contributes to pain flare-ups, and how it can also lead to other chronic diseases such as diabetes, heart disease, and even cancer.
What is Inflammation?
First, it’s important to understand that not all inflammation is harmful. A healthy, well-functioning inflammatory response is a crucial part of our immune system. It’s how the body protects itself from injury, infection, and foreign invaders.
Types of Inflammation
Acute inflammation
Acute inflammation is your body’s short-term, protective response to injury, infection, or tissue damage. It usually lasts from a few hours to a few days.
When you cut your finger, strain a muscle, or get stung by a bee, your immune system jumps into action and acute inflammation is triggered. Blood vessels in the affected area widen, allowing more blood, oxygen, and immune cells to rush to the scene.
White blood cells like neutrophils and macrophages act like the first line of defence, destroying bacteria, clearing damaged tissue, and releasing chemical messengers that coordinate healing.
Redness, warmth, swelling and pain are normal results from acute inflammation, and the effects should diminish with the inflammation.
After resistance training, this acute inflammation is essential for muscle soreness and recovery–a fact corroborated by JM Nutrition’s sports dietitians. It removes damaged muscle fibres, increases circulation, and activates cells responsible for rebuilding tissue stronger than before. The soreness you feel is part of this process, and as inflammation settles, your muscles recover, and the discomfort fades.
Chronic inflammation
Chronic inflammation is a slow, ongoing inflammatory response that can last for months or even years (Pahwa, 2023).
Unlike acute inflammation, chronic inflammation fails to resolve after the initial trigger is resolved.
A useful way to think about this is an emergency response that never stands down. Acute inflammation is like paramedics arriving at the scene and leaving once it’s under control.
What’s more, chronic inflammation occurs when that response continues long after it’s needed. Instead of helping, constant immune activation can cause unnecessary pain and even attack our own cells or DNA. When the body remains in a state of persistent low-grade inflammation, tissues can become irritated, recovery is impaired, and the risk of chronic disease increases.
Over time, this ongoing inflammatory state has been linked to conditions such as diabetes, joint and muscle disorders, cardiovascular disease, cancer, and digestive issues.
Chronic inflammation may develop due to:
- Incomplete resolution of acute inflammation
- Ongoing exposure to low-level irritants (such as air pollution or environmental chemicals)
- Autoimmune conditions where the immune system attacks healthy tissue (e.g., rheumatoid arthritis, systemic lupus erythematosus)
- Repeated episodes of acute inflammation
- Dietary patterns that promote excess pro-inflammatory cytokines and oxidative stress
- Auto-inflammatory disorders (e.g., Familial Mediterranean Fever)
Symptoms of chronic inflammation include:
- Ongoing fatigue
- Poor sleep quality
- Brain fog or difficulty concentrating
- Muscle or joint pain
- Unintentional weight changes
- Frequent infections
- Low mood or anxiety
- Digestive symptoms such as constipation, diarrhea, or acid reflux
Because chronic inflammation often develops quietly, addressing underlying lifestyle factors, including nutrition, can play an important role in supporting long-term health and symptom management.
Chronic muscle inflammation and muscle pain
Chronic muscle inflammation is a common contributor to long-term muscle pain. Unlike acute inflammation, which occurs after an injury and then resolves as healing takes place, chronic inflammation lingers. Furthermore, it may affect one area or multiple muscle groups, leading to ongoing soreness, stiffness, fatigue, and periodic flare-ups.
Broadly, chronic muscle inflammation can be grouped into two main types:
Autoimmune-related inflammation
- Includes conditions such as rheumatoid arthritis and lupus
- Occurs when the immune system mistakenly attacks the body’s own tissues
- Causes widespread inflammation, pain, stiffness, and fatigue
- Requires medical management, with lifestyle strategies and nutrition playing a supportive role
Localized muscle inflammation
- Commonly linked to muscle injury, poor posture, repetitive movements, or prolonged muscle tension
- May involve the muscle itself, tendons, and fascia (the connective tissue between muscles)
- Often presents as aching, tight, or stiff pain in specific areas or trigger points
- May be associated with reduced strength and range of motion
- Pain can be persistent or flare up from time to time
Over time, ongoing inflammation can reduce blood flow and impair oxygen and nutrient delivery to muscle tissue. In addition, it can sensitize the nervous system, leading to pain even in the absence of a new injury.
Management typically involves a combination of movement therapy, physical therapy, pain management strategies, stress reduction, and nutrition.
