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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.
Causes of Widespread Muscle Pain. Muscle pain, also called myalgia, can be localized or widespread through the whole body. Localized muscle pain is basically when you have pulled or strained one muscle, such as through exercise or overuse.This type of pain is usually related to some activity you recently performed, and can be a symptom of tension, strain, muscle imbalance, or overuse.ibromyalgia and lupus are two other conditions which can lead to this kind of pain. Treatment of widespread muscle pain depends on the causes. You should call your doctor if you have muscle pain and any of these conditions as well: 1  Your muscle pain lasts more than 3 days.