I have FM and have had it for three years now, I have NEVER had what you would call a "remission" or a break from it. I have had constant pain in my upper and lower body like the usual fibro stuff, and all the symptoms, for the last three years. The last two months tho I havent had any upperbody pain, which is very unusual for me because it would go back and forth on me constantly, but now my legs hurt so bad with constant acheing and sharp pains, and my muscles around my knees swell up so bad that I cant bend my knees, or somedays even walk because my legs and feet hurt so bad I cant put any pressure on them, and the muscle on my foot is so tight that I cant move my foot up and down or sideways, and It just feels like my muscle died, and turned to stone. I wasnt sure if you could have FM and MS together, and how would you even tell the diffrence, because I'm always in pain from the FM I just usually ignore new things and write it off to fibro. If anyone has both, I would love to hear how you found out, or how to tell the difference, or even what to do.