The exact cause of<unk>  is not known. Common trigers of<unk>  include is unknown physical or emotional trauma, abnormal pain response (areas in the brain that are responsible for pain may react differently in<unk>  patients), sleep disturbances, or infection, such as a virus, although no specific viruses have been identified as a triger of<unk> .
Fibromyalgia causes
Fibromyalgia risk factors
Complex regional pain syndrome risk factors
Polymyalgia rheumatica risk factors
Dermatomyositis causes
Bornholm disease risk factors
Osteoarthritis causes
Peripheral arterial disease causes