Muscle
pain or "Myalgia" is a
symptom of many diseases and disorders. The most common
causes are overuse or over-stretching of a muscle or
group of muscles. Myalgia without a traumatic history
may be due to
viral infections,
medications, some nutritional deficiencies,
metabolism disorders like gout, internal inflammation, autoimmune diseases, or
chronic fatigue syndrome.
Serious, long term muscle pain may be referred to as
Fibromyalgia.