Fibromyalgia

**Semantic type:** Disease or Syndrome

**Definition:** A chronic disorder of unknown etiology characterized by pain, stiffness, and tenderness in the muscles of neck, shoulders, back, hips, arms, and legs. Other signs and symptoms include headaches, fatigue, sleep disturbances, and painful menstruation.

**Synonyms:** - Fibromyalgia Syndrome - Fibromyalgia Syndrome