Hemorrhoids is a relatively common anorectal disease, its etiology is not yet completely clear, the mechanism of occurrence may be related to the doctrine of anal cushion displacement and varicose veins, etc. In addition, improper diet, bad habits may also increase the risk of hemorrhoids. 1. Anal cushion downward displacement theory: in the mucosa of the anal canal there is a layer of ring-shaped by the venous sinuses, smooth muscle and connective tissue composed of the anal canal vascular cushion, referred to as the anal cushion, when the elasticity of the perianal retraction effect is weakened, the anal cushion is congested, downward displacement and hyperplasia and hypertrophy, which may lead to the formation of hemorrhoids. 2. Varicose vein theory: the formation of hemorrhoids and venous plexus pathologic expansion, blood stagnation, etc., rectum, the mucous membrane of the anal canal of the blood vessels gradually dilated, affecting the venous blood return, the formation of varicose vein clusters, the mucous membrane protruding, and thus may be formed hemorrhoids. 3. Improper diet: when patients drink and smoke for a long time, eat a lot of spicy, stimulating food, alcohol and spicy food may stimulate the mucous membrane of the digestive tract, resulting in dilation of blood vessels, colon dysfunction, further causing the formation of hemorrhoids. 4. bad habits: when the patient does not pay attention to local anal hygiene, resulting in perianal infections, or constipation, dry stools, such as defecation when sitting on the toilet, etc., may also lead to increased risk of hemorrhoids. It is recommended that the patient timely medical examination, clear condition after targeted treatment, in life to develop good habits, pay attention to perianal cleaning, keep bowel movement, regular defecation, avoid defecation sedentary and so on.