Hello: I am a 44 yr. old female who has FM, and one of the first signs I had was rashes, usually arms, face, legs, and I also, was having swelling both feet up to knees,, and arms as well, all attributed to the Fibromyalgia. Drs. dont know why this occurs, but it is just one of the signs and sympthoms. Summertime heat was a big contributor to this, I was put on diretics, and try and stay off your feet when they are swollen. Good Luck, this is a horrible disease, and grossly neglected by our Medical Community.