Under normal circumstances, it is normal to have a bowel movement once a day. If the frequency of bowel movement is more frequent, it can be judged whether the intake of food is too much or intestinal infection, and the cause can be judged by colonoscopy in hospital, and the daily intake of food and types should be controlled. The number of bowel movements reaching two days or more than once every two days can be judged as the phenomenon of constipation. The poor digestive peristaltic ability of the intestine causes the accumulation of food residues in the intestine that cannot be discharged, and greasy and spicy food should be avoided. It is normal to have a bowel movement once a day, so you can have a bowel movement at a fixed time every day and stick to it for a long time to develop a good bowel habit.