The situation that no bowel movement occurs even after eating any food is considered to be constipation, which can be categorized into functional constipation and organic constipation, and the etiology of the two types is different. Diet less, emotional tension, intestinal motility dysfunction can lead to functional constipation; proctitis, colon tumor can lead to organic constipation. 1. Functional constipation: such as less diet, insufficient water, emotional stress, intestinal motility disorders and other reasons can lead to the occurrence of constipation. 2. Organic constipation: such as proctitis, colon tumor, Crohn’s disease, diabetic constipation, hypothyroidism and other organic diseases can also lead to constipation. If the patient has long-term constipation, it is recommended to go to the hospital in a timely manner, under the guidance of a professional physician to clarify the cause of the disease, so as not to delay the condition.