There are many reasons why pregnant women are prone to hemorrhoids, such as localized compression, hormonal changes, constipation and so on. 1. local compression: due to the rectum adjacent to the pregnant woman with the increase in pregnancy time, the uterus gradually increased, the pelvic pressure increases, due to the compression of the rectum leading to the end of the venous reflux is impeded, long-term veins become tortuous induced hemorrhoids. 2. Hormonal changes: changes in estrogen and progesterone during pregnancy may affect metabolism, gastrointestinal peristalsis, making the veins prone to expansion and other induced hemorrhoids. 3. constipation: due to the amount of exercise during pregnancy will be less than usual, so the gastrointestinal tract peristalsis poor easy to trigger constipation, dry stools are easy to stimulate the anus, resulting in poor local circulation induced hemorrhoids. Pregnant women with hemorrhoids should go to the hospital in time to check, follow the doctor’s instructions for treatment, to avoid aggravation, appear on the body adverse effects.