The cause of anal fissures in women is difficult to defecate, and understanding the causes of anal fissures can help prevent them. The following experts from the Chengdu Specialist Hospital of Anorectal Medicine will introduce the causes of anal fissures in women. The main reason for anal fissure in women is that women should be concerned about hygiene during their menstrual period and not to do heavy physical work. The woman should eat more fruits and vegetables during pregnancy to prevent constipation. When giving birth, protect the perineum and do not tear the perineum and anus. Anal fissures occur in women mainly related to the following factors, respectively: 1, physiological anatomical differences Women have an extra uterus in the pelvic cavity, squeezing the rectum, so that the rectum tilts backward, so the curvature of the rectum increases, and the stool passes more slowly than men, which can easily produce constipation. 2, menstruation and leucorrhoea stimulation women menstruation and leucorrhoea and other secretions often stimulate the anal skin, causing chronic inflammation, resulting in tissue hyperplasia to form hemorrhoids and anal eczema. It is also related to the obvious pelvic congestion during menstruation, which aggravates the local condition of the anus. 3, the influence of the fetus during pregnancy Women in pregnancy because of the increase in fetal size, compression of the rectum, so that the rectal-anal venous blood reflux is impaired, causing varicose veins and the formation of hemorrhoids. 4, postpartum abdominal cavity empty powerless Women in the postpartum period, due to the abdominal cavity empty, so that the feeling of stool dull, coupled with less activity, resulting in defecation powerless defecation difficulties, fecal retention in the intestines for a longer period of time, dry defecation difficulties, easy to tear the anus and the formation of anal fissure. 5, childbirth perineal tear Women in the process of childbirth, varying degrees of tearing the perineum, resulting in anal edema, pain and other inflammatory external hemorrhoids.