Irritable bowel syndrome is caused by irritable bowel syndrome, indigestion, constipation and other factors. When irritable bowel syndrome strikes, the intestinal function will be disturbed, not only is it unable to absorb nutrients and gas in the intestinal cavity, and intestinal peristalsis is slow, there will be a lot of gas in the intestine, and some people will have a bigger, harder stomach and more exhaust than usual. In people with indigestion, food residues stay in the digestive system for a longer period of time, and when the food ferments badly, a lot of gas is produced, so it causes the stomach to become bigger and harder, and when the gas is discharged along with the intestinal peristalsis, there is also an increase in exhaustion. If the intestinal peristalsis is too slow, it will be more difficult for the contents of the intestine to pass through, and a large amount will accumulate in the intestine, and the stomach will become bigger and harder. The feces will also cause irritation to the intestinal system and produce gas, so the number of exhausts will increase in people with constipation.