Has anyone seen any medical articles on Fibromyalgia Fatigue that are worth reading? I am trying to find some information on how and why it comes. Is it physical, mental or both. I have read that no one seems to know exactly what Fibromyalgia is. i.e. A physical/metal complaint. Why it comes. I am one of those people who want to know why and how I got this complaint. Must be a reason and there must be an answer to it.