Fibromyalgia (pronounced fy-bro-my-AL-ja) is a common and complex chronic pain disorder that affects people physically, mentally and socially. Fibromyalgia is a syndrome rather than a disease.

Unlike a disease, which is a medical condition with a specific cause or causes and recognizable signs and symptoms, a syndrome is a collection of signs, symptoms and medical problems that tend to occur together but are not related to a specific, identifiable cause.

Fibromyalgia, which has also been referred to as fibromyalgia syndrome, fibromyositis and fibrositis, is characterized by chronic widespread pain, multiple tender points, abnormal pain processing, sleep disturbances, fatigue and often psychological distress. For those with severe symptoms, fibromyalgia can be extremely debilitating and interfere with basic daily activities.

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Link: http://www.fmaware.org