Western medical understanding: 1, anatomical factors: the rectal vein is a portal system, the vein without venous valves, blood by gravity, not easy to reflux easily stagnate resulting in venous flexion expansion; the human body in the standing or seating, the anorectal rectum is located in the lower part of the body, by gravity and the pressure of the organ, venous reflux easy to obstacles; the rectal blood vessels at different heights through the muscle layer, easy to be pressurized by the fecal matter and rectal and anogenital muscle contraction, affecting the blood flow Return; hemorrhoidal veins are located in the loose tissue of the submucosa, the rectal jugular is often in the void, the surrounding lack of stent fixation, easy to expand and flex into hemorrhoids. 2, occupational factors: people work for a long time standing, sitting, long-term weight running, affecting the venous return, so that the pelvic blood return slow, abdominal organs congestion, resulting in hemorrhoidal vein filling, the vein wall tension decreases. Therefore, hemorrhoidal veins are easy to stasis expansion into hemorrhoids; or due to lack of exercise, intestinal peristalsis is reduced, feces downward slow; or due to long-term constipation, fecal pressure, stimulation, so that the local congestion, blood flow reflux obstacles, hemorrhoidal veins, the pressure within the vein increases, the vein wall tension decreases. 3, disease factors: anorectal diseases can induce hemorrhoids. (1) chronic colitis, ulcerative colitis, bacillary dysentery, dyspepsia, etc., due to prolonged diarrhea and dysentery, resulting in anorectal local congestion, hemorrhoidal venous return obstacles. As Sun Simiao said, “long diarrhea and long diarrhea, more than this disease.” (2) increased abdominal pressure disease: such as cirrhosis ascites, pregnancy, prostate hypertrophy, uterine fibroids, ovarian cysts, bladder stones, urethral fissure, chronic inflammation, emphysema, pulmonary heart disease, etc. can lead to increased abdominal pressure, the impact of portal venous reflux is impeded, hemorrhoidal venous stasis and expansion. (3) portal hypertension: due to cirrhosis, congestive heart failure, can make the portal venous return obstruction, hemorrhoidal venous return obstruction, hemorrhoidal venous plexus varicose hemorrhoids. (4) anal canal scar defect: the anal canal usually local closed water and air, when there is scar formation, affecting the anal closure, the local will be compensated by the mucous membrane tissue to fill the defect, with the anal canal tension drop, filling mucous membrane hyperplasia, congestion of hemorrhoids out of the formation of hemorrhoids. 4, dietary disorders: over-eating pungent, frying, fat, sweet and thick taste, excessive alcohol consumption may lead to dampness and heat within the birth, stool dry or diarrhea, spicy food can stimulate the anus and rectum, so that the venous plexus congestion, affecting venous return, promote venous varicose dilatation into hemorrhoids. 5, genetic factors: hemorrhoidal vein wall congenital weakness, susceptible to the influence of acquired factors, induced hemorrhoidal venous flexion expansion. 6, anal infection: inflammation around the anal canal stimulation, so that the vein wall elastic fiber fracture into collagen fibers and resistance to weaken, easy to make the venous plexus congestion varicose into hemorrhoids. The understanding of Chinese medicine: 1, dietary disorders: people eat food for days, eat five grains to produce all kinds of diseases, hemorrhoids often occur with the diet. The Complete Book of Sore and Ulcer Experiences (《疮疡经验全書》) says: “Dietary indiscretion, drunkenness and satiety, wanton consumption of fatty foods, pepper and spices, sizzling bo-canned wine, beasts and animals, and drunkenness and drinking …… are the causes of five hemorrhoids”. This means that food, such as chili peppers and peppers, will promote the occurrence or aggravation of hemorrhoids over a long period of time. 2, constipation: “sores experience book”: “wanton delay, and forbearance of stool, so that the yin and yang do not fit, Guange yongsei, wind and heat under the rush, was born five hemorrhoids.” Especially habitual constipation, the pressure of stool, squatting toilet, easy to cause venous stasis expansion. 3, long diarrhea, long dysentery, long cough: “Medical Zong Jinjian”: “there is a long time diarrhea and long diarrhea and hemorrhoids,” “a long time after the disease cough and hemorrhoids”. Chronic diarrhea, dysentery, stimulate the anal canal congestion and edema, hemorrhoidal venous stasis expansion, coupled with long-term diarrhea, qi and blood deficiency, lack of qi, can promote the occurrence of hemorrhoids. 4, pregnancy and menstrual disorders: “surgical Qixuan”: “hemorrhoids said intestinal wind is also, women due to childbirth sedentary or menstrual gas anger, cold, wet, the remaining blood seepage into the anus and born. Medical Zong Jinjian “:” there are postpartum exertion too much and born hemorrhoids “. Women’s pregnancy, Guan Ge Yong Sei, meridian overflow, qi and blood deficiency, excessive room, drunkenness and satiety with yin and yang, labor disturbance blood, stool dryness, etc. can be induced hemorrhoids. 5, genetic factors: “sores and ulcers experience book”: “there is also a father and son, mother blood and father essence into.” Xue’s medical case”: “hemorrhoids or endowed with fetal toxicity, or mother’s abdominal heat also”. Innate deficiencies coupled with the influence of acquired factors, then hair hemorrhoids. 6, visceral deficiency: “Danxi Xinfa”: “hemorrhoids, are due to visceral deficiency, external injury to the wind and dampness, internal heat and poison, drunkenness and drinking, more desire to kill themselves, so that the gas and blood fall, gathered in the anus, stagnation and not dispersed, and the punch for hemorrhoids.” Sore experience book: “life vegetarian can not drink alcohol also patients, the dirty virtual reason also”. Mostly due to the liver, spleen and kidney deficiency, resulting in insufficient qi and blood, the qi sinking, hemorrhoidal core prolapse, blood in stool. 7, feel the six evil: “Nei Jing”: “the intersection of the Shaoyang, Yi heat inside the work …… disease paralysis rash sores ulcers carbuncle gangrene acne hemorrhoids”. Dongguan Ten Books: “The good for the disease, are wet, hot, windy and dry four gas injuries, and heat for the most also. External evil invasion, dry dampness and heat, dampness and heat intertwined, injected into the anus induced hemorrhoids. 8, other: emotional disorders, sedentary, long standing, exhaustive weight-bearing can also be induced hemorrhoids, as the “Xue’s medical case”: “joy is sad, anger hurts the liver, joy and anger, gas and blood invasion of the large intestine to the Valley Road no way out, the accumulation of blocks, the birth of blood and breast milk”. The Surgery of the Zongzong: “the hemorrhoids, is the vegetarian accumulation of dampness and heat, over-eating sizzling, or due to sedentary and blood can not be, but also due to the seven emotions and over-injury of cold, as well as the burden of light load, exhaustion of long-distance travel, qi and blood vertical and horizontal, the meridians and collaterals are interlaced, or excessive alcohol, intestinal and stomach injuries, resulting in turbid qi stasis and flow of blood into the anus, can be onset.”