Pregnant women suffer from hemorrhoids for the following reasons: 1, because the uterus gradually increases in pregnancy, the pressure on the inferior vena cava will be more and more, blood retention in the internal iliac veins, affecting the venous return in the pelvis, thus increasing venous pressure, aggravating venous tortuosity and expansion, hemorrhoids are formed as a result of this; 2, with the gradual increase of the fetus, the pressure on the intestinal tract, the intestinal peristalsis gradually slowed down, fecal matter stagnant in the intestinal tract stays too long, or irregular defecation caused by the closed bowels, the toilet struggling is also the cause of the occurrence of hemorrhoids. Too long, or irregular defecation caused by the closure of the stool, the toilet Nu struggle is also triggered by the cause of hemorrhoids. Many young women, before pregnancy anal form are very good, there is no obvious symptoms, often because of pregnancy and childbirth and cause hemorrhoids, so pregnant women produce hemorrhoids, hemorrhoids is also a very common factor.