It is normal to have a bowel movement every morning, twice a day or once every two days. The exact number of bowel movements varies according to each person’s physical condition. Under normal circumstances, it takes about four hours for food ingested in the stomach to be completely discharged into the intestines. The food in the intestines takes about a day to be digested and absorbed and transformed into feces, which is stored in the sigmoid colon and rectum. Many people will have a bowel movement in the morning due to the gastrointestinal reflexes as well as the reflexes of the spleen and stomach, which leads to faster peristalsis of the colon. Normal will defecate once a day, and out of the stool is soft and hard, the color is mainly dark yellow, once the stool appears to be too thin and too hard or the color changes, should be alert to the digestive system caused by disease, can be confirmed through the routine examination of the stool.