Difficulty in defecation may be related to the following factors: First, eating a relatively simple diet with a single food composition and lack of fiber, thus reducing the stimulation of colonic motility. Second, the influence of mental factors, such as work tension, three irregular meals, prolonged late nights, changes in living habits, etc. Third, the degeneration of digestive function in the elderly, coupled with reduced activity, the peristaltic movement of the intestine is reduced. Fourth, irritable bowel syndrome, which is caused by the dysfunction of the intestine itself. Fifth, oral medications, the side effects of these drugs can cause constipation. Sixth, pregnant women in late pregnancy, the enlarged uterus and fetus compression rectum, resulting in difficult to pass stool. Seventh, patients with hemorrhoids are afraid of defecation because it tends to cause bleeding hemorrhoids during defecation, and long-term non-defecation causes the water in the stool to be absorbed and become more dry and difficult to pass.