I was dx'd with FMS/CFIDS about 15 years ago (my then PT said she hadn't seen anyone with muscles that messed up from FMS - and she was a specialist in the disease). The research is constantly changing and controverisal - I haven't seen anything "solid" about causes, etc. Your FMS might be caused by the trauma of surgery...last I heard, they considered FMS/CFIDS to be caused by many things - might be a virus for some, physical stress for others, food sensitivities for others. But whatever - the reality is that you seem to have it - nothing to do but go forward.Several of my medical "friends" (a PT and sports medicine doc) have theorized that the FMS has weakened/damaged my muscles, leaving me suseptible to more orthopedic hassles than other people might have. It's possible - I've torn and damaged more muscles than I knew existed! Arrgh! That might contribute to bad knees...who knows? A word of advice,Fibro is the doctor telling you that he doesn't know what is wrong. Go to the sit on the internet called sweet poison. You will find out some interesting things there. GenoHow do I treat FMS? Honestly, I think attitude has a great deal to do with good "treatment". People who think about having FMS, who think about their discomfort, who consider themselves as "suffering" from FMS will probably be impacted most by it. I'm not saying that I think FMS is "in your head", nor am I trying to minimize the discomfort. It's real and it can hurt very much! But scientific studies have been done that show our minds have a finite ability to feel pain - if we focus on other things, we won't think about the FMS discomfort that much...once I was in the middle of a major CFIDS/FMS blow up - migraine, blown up muscles, the works. So I celebrated (that I was alive, that it was a gorgeous day...) and went for a 50 mile bike ride! It was a wonderful day, and when I got back, I felt more alive and energetic than I could have imagined! I'd had a terrific day, and I hadn't given in to the disease.So - that's how I treat the disease - I hike, backpack, snowshoe, chop wood and work on our farm. When I've had knee problems, I tend to have a difficult time in PT - my last PT said that I've developed a high tolerance to pain as a result of my FMS/CFIDS - makes it difficult for me to know when to stop doing PT and let myself heal. I also do not follow a special diet - I eat what I want (which usually involves a fair amout of chocolate). If my muscles are very sore, I often take long, hot showers. But I really don't think about FMS...