I have IBS (called spastic colon) when I was in my 20's and now in my 50's. I also have fibromyalgia. During and after a BM, I feel the movement as it passes through my colon and sometimes feel pinching cramps along the waistline (transverse colon). I know Fibro has to do with feeling muscle spasms, SO I was wondering if IBS is also a muscle spasm problem, which is the same as Fibro spasms.Do other people literally feel the movement of stool move through their colon? Do you feel a soreness of the colon muscle at times? Please post as I feel that I'm the only one with this malady.