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Freebase(4.82 / 22 votes)Rate this definition: Muscle pain. 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.
Muscle cramps or spasms (painful) (Abdomen (lower)), Muscle cramps or spasms (painful) (Back), Pain or discomfort, Pulsating sensation. Pain or discomfort, Pulsating sensation. Bloating or fullness, Muscle cramps or spasms (painful), Nausea or vomiting, Pulsating sensation.