It is not normal to poop after three meals a day, which may be caused by intestinal flora dysbiosis, gastrointestinal dysfunction, irritable bowel syndrome and other diseases. 1. Intestinal flora dysbiosis: when patients have intestinal flora dysbiosis, the balance of the intestinal microenvironment is broken, which will lead to abnormal gastrointestinal secretion function, and after being stimulated by food, it will easily lead to the symptoms of having a bowel movement after three meals. 2. Gastrointestinal dysfunction: when patients with gastrointestinal dysfunction, it will lead to gastrointestinal peristalsis, gastrointestinal peristalsis is more hyperactive after eating, and the water in the gastrointestinal tract can not be absorbed normally, leading to the symptoms of stool after three meals. 3. Irritable bowel syndrome: the gastrointestinal tract of patients with irritable bowel syndrome is very sensitive, and when the gastrointestinal tract is affected by food, temperature stimulation and other factors, it is easy to lead to gastrointestinal peristalsis, causing patients to experience the symptoms of bowel movement after three meals. When patients have the above situation, it is recommended to go to the hospital in time, under the guidance of professional physicians to clarify the cause of the disease and treatment.