https://www.rheumatology.org/practice/clinical/patients/diseases_and_conditions/fibromyalgia.asp
American College of Rheumatology
Fibromyalgia is defined by chronic widespread muscular pain and tenderness, and affects 2 to 4% of the population, especially women. Find out about the causes and treatment of fibromyalgia, tips on living with this condition, and a listing of medical experts (rheumatologists) who treat it.