Pregnant women are prone to hemorrhoids, including rectal-anal varicose veins, low activity, constipation, etc., as follows: First, rectal-anal varicose veins: with the prolongation of pregnancy, the fetal volume gradually increased, the abdominal pressure of pregnant women will gradually increase, which affects the venous reflux of the anus. Because the rectum and anal canal is located in the lowest part of the abdominal cavity, and the increased pressure in the abdominal cavity will cause the veins of the rectum and anal canal to return to the portal vein, which will cause rectal-anal varicose veins, and for a long time will form hemorrhoids. Second, less activity: due to the low activity of pregnant women, there may be a long time sedentary. Third, constipation: some pregnant women will be constipated, due to certain dietary preferences during pregnancy, such as like to eat spicy, stimulating food, can also induce the occurrence of hemorrhoids, or eat dietary fiber to reduce the cause of dry stools, stool relief time is prolonged, constipation will also lead to the occurrence of hemorrhoids. All of these reasons can be triggers for the formation of hemorrhoids.