A bowel movement once every four days can be caused by indigestion, constipation, gastrointestinal disorders, or poor living and eating habits. A bowel movement once every four days is not normal. Under normal circumstances, the frequency of bowel movements should be one to two times a day or once every two days. This is because after food nutrients are absorbed, the remaining food residue will accumulate in the sigmoid colon and rectum and will be excreted when a certain dose is reached. If the stool is not discharged for more than two days, it is likely to become a hangover, which will lead to dry stools, difficulty in defecation, and long defecation time. Patients who have bowel movements once every four days can usually eat more high-fiber foods in their diet, such as spinach, celery, corn, and a variety of fruits, which can promote intestinal peristalsis and relieve constipation. Normally, you should also develop the habit of regular defecation, and also drink more water and exercise. Indigestion and other causes of constipation, the patient can also be under the guidance of the doctor oral probiotics, gastric motivation drugs, laxative drugs and other treatment, such as bifidobacterium bifidum, domperidone, lactulose oral solution. There are many causes of bowel movement once every four days, so if necessary, you can go to the hospital and follow the doctor’s instructions for treatment.