Fibromyalgia
Fibromyalgia is characterised by chronic widespread pain in muscles or joints. It's symptoms include debilitating fatigue, disturbance of the sleep and joint stiffness. Its exact cause is still unknown but is believed that it's factors are genetic, psychological, neurobiological and also environmental. Fibromyalgia symptoms may be coused by brain anomalies, resulted from childhood stress, or prolonged or severe stress.