The majority of medical doctors in China currently believe that hemorrhoids occur mainly for the following reasons: 1, anatomical reasons When a person is standing or sitting, the anorectum is located in the lower part, due to gravity and the compression of the organs, the venous upward reflux is quite obstructed. 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 submucosa and lack of scaffolding around them, so they are easily expanded and flexed. 2.Genetic relationship The venous wall is congenitally weak, with reduced resistance, and cannot tolerate intravascular pressure, thus gradually dilating. 3.Occupational relationship People standing or sitting for a long time, long-term weight-bearing, affect the venous reflux, so that the pelvic blood flow and abdominal organs congestion, causing excessive filling of hemorrhoidal veins, the tension of the venous wall decreased, the blood vessels are easy to stasis expansion. And because of the lack of movement, intestinal peristalsis, stool down sluggish, or habitual constipation, can compress and stimulate the veins, so that the local congestion and blood return obstruction, causing hemorrhoid veins within the pressure rise, the vein wall resistance is reduced. 4.Local stimulation and dietary irregularities The anal part is subject to cold, heat, constipation, diarrhea, excessive drinking and more spicy food, can stimulate the anus and rectum, so that the hemorrhoid venous plexus is congested, affecting the venous blood return, so that the resistance of the venous wall is reduced. 5, the anal vein pressure increase because of liver stiffness, liver congestion and cardiac insufficiency, etc., can make the anal vein congestion, pressure increase, affecting the rectal venous blood return. 6, increased intra-abdominal pressure because of intra-abdominal tumors, uterine tumors, ovarian tumors, prostate hypertrophy, pregnancy, eating too much or squatting too long, etc., can make the intra-abdominal pressure increase, preventing the venous blood flow back. 7.Anal infection The hemorrhoid plexus is first inflamed by acute and chronic infection, the elastic tissue of the vein wall gradually fibrosis and weakness, insufficient resistance, and the expansion of varicose, plus other reasons, so that varicose veins gradually aggravate, generating hemorrhoids. There are also some lifestyle problems, such as eating too much, eating fine food or holding stool, squatting too long, etc., are the reasons for the formation of hemorrhoids.