Fibromyalgia affects millions of Americans but remains somewhat of a medical mystery as patients complain of diffuse pain and other common ailments -- including fatigue, sleep problems, depression, headaches and irritable bowel syndrome. Researchers are not sure what causes the chronic affliction; some believe it might be triggered by an emotional or traumatic event and others say it is a neuro-chemical problem related to disordered sleep and poor exercise. For many patients, a big hurdle is getting a correct diagnosis.

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