Hello, I am also a fibromyalgia sufferer along with RSD and TOS.

This is the definition of fibromyalgia according to the Encyclopedia: I have never heard it to be a virus.
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Fibromyalgia (FM) is a disorder classified by the presence of chronic widespread pain and tactile allodynia.[1] Fibromyalgia patients are also typically affected by a number of symptoms other than pain, including debilitating fatigue, abnormal sleep architecture,[2] functional bowel disturbances[3] and a variety of neuropsychiatric problems including cognitive dysfunction,[4] anxiety and depressive symptoms. While the criteria for such an entity has not yet been thoroughly developed, the recognition that fibromyalgia involves more than just pain has led to the frequent use of the term “fibromyalgia syndrome.” It is not contagious, and recent studies suggest that people with fibromyalgia may be genetically predisposed.
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Has she seen a rheumatologist? That doctor will probably either manage the pain there or have her see a pain specialist. There are many medications out there that can help her with pain. Epsom salt baths also help. I use heat at night too to try to keep the muscles from tightening.

I am sorry that there is another person that deals with this condition. It's not fun.