The reason for hemorrhoids is not completely clear, but now there are 2 kinds of doctrine, namely, the doctrine of anal cushion displacement, varicose vein doctrine. 1. Anal cushion downward movement theory: anal cushion has the role of closure of the anal canal, restraining defecation, when the anal cushion of the elastic retraction ability to decline, can not be retracted back into the anal canal, the anal cushion and thus appeared to be congested, downward movement, hyperplasia and hypertrophy and the formation of hemorrhoids. 2. Varicose vein theory: prolonged sitting and standing, pregnancy, prostate hypertrophy, pelvic tumors, constipation and other causes of rectal venous reflux obstruction of venous plexus pathologic dilatation, blood stagnation and thus lead to the occurrence of hemorrhoids. 3. other: long-term drinking, eating a lot of stimulating food and other local congestion; malnutrition leads to local tissue atrophy and weakness can induce hemorrhoids. When hemorrhoids appear, you should go to a regular hospital in time, under the guidance of a professional doctor, to prevent the development of hemorrhoids, and choose the appropriate treatment to improve the quality of life.