What is fibromyalgia? what causes it? are there any specific tests that can detect this condition?

See details: Fibromyalgia is the most common rheumatologic disorder in women under 40. It is a syndrome of chronic pain and fatigue, soft tissue tenderness and disrupted sleep. While it is fashionable to call it a neurologic disorder of abnormal processing of painful stimuli, there is little firm data to support that theory. There are no diagnostic tests. The diagnosis is based on a history and physical.

Multifactorial : ? def., cause & tests for fibromyalgia; chronic body-wide pain disorder w. fatigue, mild confusion & restless sleep; in about 4% population; mostly females. Causes several/variable: multiple childbirths, obesity, biomechanical injury pelvis/low back, prolonged convalescence, genetically-natured Hypermobility Syndrome, depression & inactivity. Diagnosis via neg labs & compatible clinical profile.