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Published on: 7/15/2026
What causes body aches when you have a cold?
Body aches are a common symptom of a cold, caused by the body's natural response to viral infection. When you catch a cold, your immune system releases proteins called cytokines to fight off the virus. These cytokines trigger inflammation and can cause muscle soreness, joint pain, and general discomfort throughout the body.
Additional factors contributing to cold-related body aches include:
- Immune response: White blood cells activate to combat the virus, producing inflammation as a side effect.
- Dehydration: Fluid loss from fever, congestion, or reduced intake can worsen muscle stiffness.
- Reduced activity: Resting in bed for extended periods can lead to muscle tension and soreness.
- Fever: Elevated body temperature can intensify aches and fatigue.
Managing body aches typically involves rest, hydration, over-the-counter pain relievers, and warm compresses.
However, body aches aren't always just a cold—they can signal the flu, COVID-19, or other conditions that may require different care. To better understand your symptoms and know what steps to take next, take a free, instant, online symptom check. It only takes a few minutes and can help you make informed decisions about your health.
Reviewed for medical accuracy: 07/14/2026
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Immune Response
When you catch a cold, your body's immune system responds to the viral infection by releasing various chemicals, including cytokines and prostaglandins. These substances help fight off the virus but can also lead to inflammation and pain in the muscles and joints, resulting in body aches.
Inflammation
The inflammatory response triggered by the immune system can cause swelling and irritation in tissues throughout the body. This inflammation can affect muscles and joints, leading to discomfort and a general feeling of malaise.
Muscle Fatigue
During a cold, you may experience fatigue and reduced physical activity due to symptoms like fatigue, sore throat, and congestion. This lack of movement can lead to muscle stiffness and discomfort, contributing to the sensation of body aches.
Fever
Colds can sometimes cause a mild fever, which is another part of the body's immune response. Fever can lead to increased metabolic activity and muscle breakdown, resulting in feelings of soreness and fatigue.
Dehydration
Cold symptoms, such as nasal congestion and coughing, can lead to dehydration, especially if you are not drinking enough fluids. Dehydration can cause muscle cramps and aches, further contributing to the overall discomfort. If you're experiencing these symptoms and want to better understand what might be causing them, try our free AI symptom checker for personalized insights.
(References)
Eccles R. Understanding the symptoms of the common cold and influenza. Lancet Infect Dis. 2005 Nov;5(11):718-25. doi: 10.1016/S1473-3099(05)70270-X. PMID: 16253889; PMCID: PMC7185637.
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