Does IBS cause intestinal spasms?

IBS is spasms. Irritable bowel syndrome is kind of a catch-all name for a group of functional bowel disorders- called this because anatomically all is normal. There is an exaggerated response to stimuli: for instance, intestinal activity that someone without ibs wouldn't feel can be experienced as quite painful by someone with ibs. Theories include unusual nerve activity and differences in intestinal bacteria.