For “what is hemorrhoids” at present in the medical profession there are more than ten different say, it can be said that “the public have reason, the mother-in-law have reason”, “a hundred schools of thought, a hundred flowers bloom”, there is a kind of Uncertainty, so that people are at a loss for feeling, and for the “why hemorrhoids” this issue, is to achieve a more consistent opinion, generally believed to be related to the following factors: 1, the human upright position According to the survey: monkeys, cows, goats, dogs, rabbits, cats and other four-legged animals do not suffer from hemorrhoids, and upright humans are susceptible to hemorrhoids. From this it is thought that hemorrhoids are evolved from crawling animals into two-legged upright human rectal-anal local evolution failed to develop to adapt to the upright posture and the occurrence of endemic diseases. From the anatomical point of view, the upper rectal vein and its branches do not have a venous valve, from the bottom up through the rectal muscle layer to the heart back to the heart, in the geocentric attraction of the influence, it is easy to occur blood stasis, so that varicose veins. 2, defecation abnormality Long-term habitual constipation defecation difficulties or diarrhea, or like to squat in the toilet to read books and newspapers, due to force defecation, or squatting too long, it is easy to lead to rectal anus congestion, pressure, varicose veins, and over time, the anal cushion tissues are loose, or even lead to pull the fixed anal cushion of the muscle rupture, the anal cushion out of the anus and the formation of a serious hemorrhoids. 3, infection dysentery, enteritis, parasites (such as pinworms, etc.), anal cryptitis, anorectal abscess, anal fistula, etc., can cause perihemorrhoidal vein inflammation or hemorrhoidal vein endocarditis, hemorrhoidal vein congestion, expansion and lead to hemorrhoids. 4, bad dietary habits drinking a lot of alcohol, spicy food, such as chili, mustard, pepper, ginger and other rich stimulating food, but also easy to make the rectal mucosa anus skin stimulation, local congestion, feel the burning pain, to become a trigger or aggravation of hemorrhoids triggered by the causative factors. 5, pregnancy, childbirth and pelvic and abdominal diseases During pregnancy, the fetus presses on the pelvic veins, causing blood stasis in the lower rectum, causing vasodilatation. The influence of endocrine hormone during pregnancy can make the pelvic blood vessels, rectal blood vessel dilation and produce hemorrhoids, hemorrhoid symptoms will be relieved naturally after delivery. Abdominal and pelvic tumors such as colorectal tumors, ovarian tumors and uterine fibroids and other compression of the pelvic veins can cause venous stasis and dilation of the upper rectal veins and induce hemorrhoids. 6, the nature of the work Easy to make anal stasis causes, in addition to the above factors, there are many in daily life, such as engaged in a long time to maintain the same position and inactivity of the work, is also one of the reasons. In often standing work (such as school teachers), sitting work such as (drivers) and heavy labor (such as porters), etc., there are many people are suffering from hemorrhoids, the reason is this. In addition, must instantly withstand the abdominal pressure of the sports players, also prone to hemorrhoids. 7, cumulative labor cumulative labor is also caused by hemorrhoids is an important factor. One to the end of the year, “prolapse of the anus”, “swollen anus can not be hemorrhoids pressure back” (embedded hemorrhoids) patients will increase, probably because during this period of work especially busy relationship, or before and after the Chinese New Year all-night entertainment, these people tend to be overworked, not enough sleep, but also due to drinking alcohol, these people will be overworked. Lack of sleep, but also due to drinking alcohol, playing mahjong sedentary, and aggravate stasis in the anus. Accumulated fatigue will make the tension of the delicate fibers supporting the anal cushion relax, and the internal hemorrhoidal core will be easy to prolapse.