There are many causes of hemorrhoids, Dr. Wang Kai of the Department of Proctology, Henan Provincial Hospital, pointed out the following points in particular: 1, bad defecation habits squatting position when reading a newspaper, resulting in squatting and defecation time is prolonged, easy to cause stasis of blood in the anorectum and induce disease. Smoking when going to the toilet can buffer the brain’s defecation reflex, which is very likely to cause constipation. Excessive force during defecation, some people do not care whether the feeling of defecation is strong, blindly and constantly violently struggle, can only make the rectum anus and pelvic floor muscles increase unnecessary burden and local stasis, leading to the occurrence and development of disease. 2, defecation abnormalities diarrhea and constipation are important factors in the development of anal diseases. Constipation is the biggest bane, long-term retention of toxic substances in the rectum can not only induce rectal cancer, and the accumulation of feces, affecting blood circulation. The pressure on the anal canal to remove dry stools will inevitably result in a series of pathological changes such as stasis, swelling and fissures. Diarrhea is often a clinical manifestation of colon disease, diarrhea can also increase the chance of local infection in the anus, resulting in anal sinusitis, inflammatory external hemorrhoids, perianal abscesses and other diseases. 3, dietary factors It is natural that dietary patterns or dietary varieties inevitably change in daily life. The quality of food, such as the quality of coarse, change in the type of vegetables and the amount of increase or decrease, the amount of protein, fat, starch, fiber and other content, water intake, can directly affect the stool composition, causing anorectal disease. The incidence of anorectal diseases increases significantly in people who have been drinking alcohol for a long time or who like spicy foods, because alcohol and spicy substances can stimulate the mucous membrane of the digestive tract, causing vasodilation and colon dysfunction. The national census data shows that the incidence of spicy food is 61.6%, and the incidence of alcohol consumption is 64.6%, which are significantly higher than the total incidence. 4, occupational factors long-term standing or sedentary. Because of the upright or sedentary posture, the anorectum resides in the lower part of the body, and the hemorrhoid vein does not reflux well. 5, chronic diseases such as long-term malnutrition, weakness, causing the anal sphincter relaxation and weakness. Long-term chronic bronchitis, emphysema, coughing and wheezing caused by the rise in abdominal pressure, pelvic stasis. Chronic hepatitis, hepatic steatosis, diarrhea, colitis, etc. are all triggers for the occurrence of anal diseases. Therefore, in prevention, we should focus on the patient’s systemic status and take reasonable and effective preventive measures. 6.Genetic relationship The venous wall is congenitally weak, with reduced resistance, and cannot tolerate intravascular pressure, thus gradually expanding. 7, increased anal venous pressure Due to hepatic sclerosis, liver congestion and cardiac insufficiency and other diseases such as intra-abdominal tumors and prostate hypertrophy can increase intra-abdominal pressure and form hemorrhoids, including, of course, pregnancy. 8, local stimulation and dietary disorders The anus can be stimulated by cold, heat, constipation, diarrhea, excessive drinking and eating spicy food. 9.Anatomical reasons When people are standing or sitting, the anorectum is located in the lower part, and the upward venous reflux is rather obstructed due to gravity and the compression of the organs. The rectal vein and its branches lack of venous valves, blood is not easy to return, easy to stasis. Its vascular arrangement is special and crosses the muscular layer at different heights, which is easily compressed by the fecal mass and affects the blood return. The veins also pass through the lax tissue of the submucosa and lack a surrounding stent to fix them, making them prone to expansion and flexion.