Fibromyalgia syndrome is a common and chronic disorder characterized by widespread muscle pain, fatigue, and multiple tender points. The word fibromyalgia comes from the Latin term for fibrous tissue (fibro) and the Greek ones for muscle (myo) and pain (algia). Tender points are specific places on the body; on the neck, shoulders, back, hips, and upper and lower extremities; where people with fibromyalgia feel pain in response to slight pressure.

Eosinophilic fasciitis , or EF, is a form of fasciitis. It is distinguished from scleroderma primarily because the affected area is the fascia ...