A disorder of pain regulation, sometimes classified as a kind of central sensitization
Chronic musculoskeletal pain not explained by another systemic disorder
More common in women than men
Fibromyalgia
Rheumatoid arthritis
Polymyalgia rheumatica
Sjögren Syndrome
Complex regional pain syndrome
Systemic lupus erythematosus
Polymyositis
Ankylosing spondylitis