If you do not have bowel movement for a few days, it may be caused by insufficient food intake, too fine diet, or intestinal flora imbalance. 1. Inadequate food intake: It may be due to the recent diet is relatively small, not able to produce enough stool, so there is no bowel movement, but usually no other symptoms. 2. Diet too fine: may be the food eaten is too fine, intake of dietary fiber is relatively small, the volume of feces in the intestinal tract is insufficient to stimulate intestinal peristalsis, thus leading to no bowel movement without stool. 3. Intestinal flora imbalance: If the harmful bacteria in the intestinal tract increase while the beneficial bacteria decrease, the harmful bacteria will be in a dominant position, affecting the absorption of food, and affecting the formation of stools, leading to the phenomenon of no bowel movement. No bowel movement for a few days, there may be caused by other factors, such as irritable bowel syndrome, if accompanied by other uncomfortable symptoms, should be timely medical treatment under the guidance of a physician, usually drink more water, increase the amount of exercise, regular diet and work and rest, and develop good living habits.