Usually no bowel movement for more than 48 hours can be called constipation. If a patient does not have a bowel movement for more than 48 hours, the stool accumulates in the sigmoid colon and rectum. The main role of the large intestine is to absorb water, and prolonged retention in the large intestine will lead to dry and hard stools, and it will be more difficult to expel stools, which usually leads to a vicious cycle, and the symptoms of constipation should be addressed at the root. For patients with constipation, it is recommended to consume sufficient amounts of dietary fiber, in green vegetables, such as spinach, celery and other fiber content, should be eaten more to help relieve constipation. In addition, patients with constipation should drink more water, water is necessary to increase intestinal fluid, and the increase in intestinal fluid is conducive to the smooth passage of stool.