http://www.niams.nih.gov/Health_Info/Fibromyalgia/default.asp
National Institute of Arthritis and Musculoskeletal and Skin Diseases Information Clearinghouse
Fibromyalgia syndrome is a common and chronic disorder characterized by widespread pain, diffuse tenderness, and a number of other symptoms. Questions and answers cover causes, diagnosis, and treatment of fibromyalgia, and what you can do to feel better.