My current girlfriend was diagnosed with fibromyalgia a couple years ago (about a year before I met her). When I first met her, she had all the classic symptoms of a fairly advanced case: Exhaustion all the time, deep pains (like they were down inside the bone) that tended to appear at different places around her body over time, and nodules or lumps in her hip muscles that were stiff and painful, particularly in the morning on waking up, and in the evening at the end of a long day. Her exhaustion was so bad that she would sometimes pass out at street lights when driving. If the car was moving, then she would stay awake because of the stimulation of reacting to the changing environment. But when waiting at a long stoplight with no stimulation, she sometimes passed out until the cars behind her started honking their horns. Also, she could walk around as much as she wanted with no particular problem, but she couldn’t stand still (for example, in line at a ticket counter) for more than about 60-90 seconds. Any longer than that, and she would get dizzy and pass out. If it was absolutely necessary to stand in line, then she needed to be sitting or leaning against something.
According to the literature on fibromyalgia, the genesis of the disease is usually tied to long-term stress and disrupted sleep patterns, and that was pretty much what happened to her. Her previous marriage had been highly stressful and antagonistic for a lot of years before she got up the nerve to divorce her husband. The divorce was stressful of course, and her job environment was very stressful as well. And for quite some time (a couple years, I gather), she had gotten no more than 3-5 hours of sleep per night. She had a hell of a sleep deficit. Also, her stomach was going to hell due to all the stress.
When she and I moved in together, I talked her into quitting her job and just doing a little light work at home. I also introduced her to Zantac for her stomach and a white noise machine to help her sleep at night (she was such a light sleeper that any little noise would wake her up). Ultimately, once the stress was taken out of her life, she suddenly began sleeping 10-12 hours per day.
That was a year ago. Her fibromyalgia is much improved today, but the progress is slow. Based on her progress so far, she’ll probably need another year or two before she really feels normal again. Currently, she sleeps about 9-11 hours a night (which represents an hour less than a year ago). She’s completely alert and engaged and happy when awake, but her energy levels bounce around a bit. She’ll get a burst of energy that lasts a couple days, and she’ll do a lot of work around the house during that time, but it will sap her and she’ll feel exhausted and need a couple days to rest up after that. She still gets a lot of pain from her hip (I haven’t asked her if any of the lumps have shrunken yet), but she doesn’t complain of the deep, floating pains any more. She doesn’t pass out at stop lights any more, and standing in lines isn’t much of a problem any more, for the most part.
All in all, it’s a tremendous improvement from the state of total exhaustion and pain she lived with a year ago, but the progress is slow and she’s a little frustrated that it’s staying with her for so long and that she sleeps away so much of the day. But I imagine that after the several years of sleep deficit that she logged, it probably takes a couple years to repair the damage and replenish the reserves.
So to answer your question, Dinsdale, I think a lot of the problem is generated because of sleep deficits and stress. Those are typically considered to be mental/emotional causations, so it’s probably fair to say that the disease has mental/emotional origins. But after enough years of sleeplessness and stress, I think that the body goes through tremendous physical damage (including to the nervous system), and the fibromyalgia and the symptoms of pain and exhaustion are the outward manifestation of all that physical damage. As such, I think that the actual symptoms of the disease indicate a certain level of physical damage that has occurred in the body across the years due to long-term stress and sleeplessness.
To put it succinctly, I think that the disease originally arises from mental/emotional problems (stress and disrupted sleeping patterns), but that the actual pain and exhaustion that set in over time are symptoms of subsequent and ongoing physical damage to the body and nervous system after years of stress and sleeplessness.
Here are the usual disclaimers: I’m not a doctor, and I don’t have any prior or personal experience with the disease. I’ve drawn my conclusions from my GF’s experiences with the disease and from some light reading on the subject on the Internet and in newspapers over the last year or so.