Fibromyalgia

The prominent feature of FMS (Fibromyalgia Syndrome) is chronic, widespread musculoskeletal pain, but it is usually accompanied by other multi-systemic dysfunctions. 

Fibro refers to fibrous tissue

Myo refers to the muscles

Algia refers to pain

Fibromyalgia is assigned number M79.0 as non-articular rheumatism in the World Health Organisation's International Classification of Diseases (ICD). 

Compelling evidence of physiological and biochemical abnormalities identifies FMS as a distinct pathophysiological clinical disorder.

(from the Canadian Clinical definition)