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(December 2013). Myalgia, or muscle pain, is a symptom of many diseases and disorders. The most common causes are the overuse or over-stretching of a muscle or group of muscles.Myalgia without a traumatic history is often due to viral infections.Longer-term myalgias may be indicative of a metabolic myopathy, some nutritional deficiencies or chronic fatigue syndrome.he most common causes are the overuse or over-stretching of a muscle or group of muscles. Myalgia without a traumatic history is often due to viral infections. Longer-term myalgias may be indicative of a metabolic myopathy, some nutritional deficiencies or chronic fatigue syndrome.
Muscle pain affecting the body's soft tissue is called myofascial pain syndrome or MPS. The fascia is connective tissue covering the muscles. Myofascial pain syndrome may involve either a single muscle or a muscle group. In some cases, the area where the pain is felt may not be where the myofascial pain generator is located.