It can be said that the majority of female patients with hemorrhoids tend to appear during pregnancy, or already have hemorrhoids in the pregnancy of the patient’s clinical symptoms will be aggravated. In our clinical practice, we often come across many female patients complaining that their hemorrhoids are produced when they are pregnant with their babies. So why are pregnant women especially prone to hemorrhoids? These are mainly the following aspects of the reasons: 1, pregnancy can cause a gradual increase in abdominal pressure, with the gradual increase of the uterine body, the pressure on the inferior vena cava is also increasingly aggravated, especially when the fetal position is incorrect, the pressure is more pronounced, directly affecting the lower end of the rectum, the venous return of the anal canal, resulting in hemorrhoidal vein congestion, dilation and thus triggered by hemorrhoids. 2, in pregnancy, on the one hand, the increasing body of the uterus oppression of the intestinal canal, on the other hand, women in this period due to the inconvenience of activities, generally less activity, gastrointestinal peristalsis slowed down significantly, feces in the intestinal lumen stays longer, feces within the water is absorbed in excess, caused by the dry stools, defecation difficulties and other constipation symptoms. Dry feces will make the hemorrhoidal veins varicose, expand and form hemorrhoids, in addition, the dry hard feces is easy to rub through the hemorrhoidal mucous membrane and bleeding, and even make the original hemorrhoidal nucleus prolapse outside the anus and hemorrhoidal nucleus inlay, resulting in severe pain in the anus, walking inconvenience, and a series of symptoms. 3, pregnancy, the body’s hormone level has undergone more changes, the female body’s progesterone, relaxin, etc. will increase, making the body’s fibrous connective tissue becomes soft and elastic, resulting in water and sodium retention, vascular expansion, thus making it easier for hemorrhoidal veins to bruise, varicose and expand.