During pregnancy is very easy to get hemorrhoids, get hemorrhoids during pregnancy with the pelvic cavity, abdominal pressure increases during pregnancy, changes in body hormone levels and changes in lifestyle habits and other factors are related. First, due to the gradual increase of the uterus squeezing the pelvic and abdominal cavities, abdominal pressure gradually increased, the inferior vena cava reflux poor blood vessels have also become more flaccid, especially to make the hemorrhoidal vein reflux more difficult, hemorrhoidal veins are prone to dilation, tortuosity, congestion, will exacerbate the occurrence of hemorrhoids. Secondly, the hormone level change during pregnancy, progesterone increase reduce the elasticity of the veins, easy to cause vein relaxation, expansion, make hemorrhoids more prone to the onset of hemorrhoids. Third, the hormone level changes during pregnancy, life and diet habits change, cause gastrointestinal dysfunction easily cause constipation. When defecating, forcefully squeezing the rectum and anus, so that the anal hemorrhoidal vein reflux is blocked, further aggravating the occurrence of hemorrhoids. Fourth, the possibility of hemorrhoids in ordinary life is relatively large, before pregnancy itself has hemorrhoids, after pregnancy hemorrhoids symptoms will be aggravated.