I know its irritable bowel syndrome-but please explain it to me?

IBS explained: Irritable bowel syndrome (ibs) is a condition associated w/ abdominal discomfort, altered /alternating stool pattern, accompanying nausea, bloating, gassiness. Often improved by stooling, ibs is defined by changes in perception of gut distension, motility, sensation. Diet & emotional stress play significant roles here in such patients. Need to rule out first inflammation, ischemia, & infection.