IBS is perhaps one of the most common frustrating complaints we see in gastroenterology. It can impact anyone and everyone. Men, women, children, adults, older folks, everyone. IBS is thought to be a combination of issues in how your intestine moves as well as issues in how your body and your nerves report stretching in the intestine. One type of IBS can cause an overabundance of diarrhea. The second type can cause constipation. And there’s also a third type, which is somewhere in between, and you might see alternation between the two.