Hemorrhoids are the most prevalent of the anorectal diseases. Hemorrhoids are rare in children in the early years of life, but the incidence increases rapidly with age. Etiology: The onset of hemorrhoids is related to anal hygiene and defecation factors, mainly factors that are detrimental to the health of the anus and are present in defecation, diet, family life, and occupation. Cold in the lower back, eating irritating foods, constipation, and straining to defecate can lead to hemorrhoids. In men, factors that aggravate hemorrhoids include exertion, alcohol consumption, and irregular lifestyle, and in women, pregnancy and childbirth. Age is also associated with the development and aggravation of hemorrhoids. The symptoms of hemorrhoids have a tendency to worsen gradually with age. 1, pregnancy, childbirth and the onset of hemorrhoids analysis. Pregnancy, childbirth can make hemorrhoids significantly aggravated by: (1) large uterine compression, resulting in hemorrhoidal vein blood stagnation. (2) Increase in venous blood flow, which Schottler reported to be increased by 25% in pregnancy. (3) In the enlarged uterus compression of the intestinal tube and lead to defecation obstacles, feces become hard, defecation force increased. (4) The tissues of the pelvic organs become brittle or loose, and are therefore susceptible to injury or inflammation. (5) Hormone-related pregnancy hormones such as progesterone and relaxin dilate blood vessels or soften tissues. (6) Changes in dietary activities during pregnancy and lack of exercise lead to blood stasis and constipation, which aggravate anal disorders. In the middle and late stages of pregnancy, the above tendencies are more obvious. Therefore, the upcoming pregnancy or pregnant women, especially those who have hemorrhoids in the past, we should pay attention to anal hygiene, such as attention to make the stool to maintain a smooth and not too hard defecation. To avoid constipation medication eat a high fiber diet and avoid stimulating foods. Do not use stimulating laxatives but use laxatives. To avoid stagnation of blood, do not expose the lower back to cold. Moderate exercise and so on. 2, defecation disorders and the onset of hemorrhoids. 3, the etiology of hemorrhoids doctrine. Humans from early childhood, in the rectal mucosa and perianal skin under the presence of submucosal venous plexus and subcutaneous venous plexus, respectively, with the gradual increase in its size, respectively, the formation of internal hemorrhoids, external hemorrhoids and hemorrhoidal nuclei and the emergence of symptoms. Regarding the occurrence of hemorrhoids, there used to be three theories: varicose vein theory. Vascular proliferation theory. Mucosal slippage theory. Thomson’s study of hemorrhoidal tissue in 1975 found that in humans, the connective tissue surrounding the submucosal blood vessels in the rectum was more developed, and he referred to this connective tissue as a lining. Hass reported that this connective tissue is composed primarily of collagen or elastic fibers, and that the hemorrhoidal nucleus is vascularized by small arteries and veins.Thomson referred to this supportive tissue as a lining, and this lining, or stroma, containing the venous plexus, is further supported and anchored to the upper not (pelvis) by the ligament of Treitz, which is the longitudinal and anorectal muscle in the rectum. Extended internal? External sphincter between the descending process gradually formed a thin band of fibrous structure, through the internal sphincter, along the lower part of the anus radial extension, attached to the anal epithelium. In the hemorrhoidal nucleus enlargement at the same time, coupled with each defecation to the outside of the force, Treitz ligament gradually lengthened, the development of “prolapse” state. thomson accordingly put forward the “cushion downward displacement doctrine”. Thomson accordingly proposed the “doctrine of sublining”. According to the doctrine of sublining, the submucosal and subcutaneous venous plexus of the anal canal is innate and surrounded by strong connective tissue, because the connective tissue is thicker and normal in form and function, the venous plexus will not develop into venous aneurysm. With age, the connective tissue becomes fragile and disrupted, and over the age of 20 years this connective tissue begins to disintegrate into a fractured state, and the venous plexus loses its constraints and expands to become hemorrhoids and develops symptoms.