Not having a bowel movement for two or three days is an abnormal phenomenon and may be due to constipation. Patients can wake up in the morning and drink a glass of honey water to promote gastrointestinal peristalsis and help defecation, and eat more fiber-rich foods, such as hawthorn, apple, banana, leek, spinach, etc., and eat less or no greasy, spicy and hard-to-digest food. If the symptoms of constipation are not relieved, you can take laxative drugs under the guidance of a doctor, and in severe cases, you can also treat with topical cork. In addition, if there is serious abdominal distension, abdominal pain and anal cessation while constipation, you need to go to the gastroenterology department for gastroscopy in time to clarify whether there is a possibility of intestinal tumor. In daily life, you should develop good bowel habits and not hold your bowel movements or delay them in non-emergency situations to avoid disrupting the normal bowel cycle.