DefinitionFibromyalgia is a common syndrome in which people experience long-term, body-wide pain and tender points in joints, muscles, tendons, and other soft tissues.Fibromyalgia has also been linked to fatigue, sleep problems, headaches, depression, anxiety, and other symptoms.Alternative NamesFibromyositis; FibrositisCauses, incidence, and risk factorsThe cause of this disorder is unknown. Although none have been well proven, possible causes or triggers of fibromyalgia include:Physical or emotional traumaAn abnormal pain response. Areas in the brain that are responsible for pain may react differently in fibromyalgia patients.Sleep disturbances, which are common in fibromyalgia patients.An infectious microbe, such as a virus. At this point, no such virus or microbe has been identified.Me