A persistent cough is the most common cause of sore muscles that cause chest pain. Repeated coughing strains and aggravates the chest muscles. Muscle cramps can also develop due to overuse from exercise or repetitive activity, and dehydration. Chronic pain syndromes such as fibromyalgia also cause sore muscles. Unlike muscular pain elsewhere in the body, it is best to see a doctor about chest pain, as the true cause can be difficult to pinpoint by symptoms alone.

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