Hemorrhoids are very common in pregnancy. They are swollen varicose veins around the anal opening that can be very uncomfortable. The enlarging uterus will cause an increase in the pressure of these veins making them swell significantly. Hemorrhoids are more likely if you are dehydrated and are constipated. They may often enlarge during the pushing phase of your labor. Most of them will shrink considerably within a few weeks after birth. At times the blood in the hemorrhoid will clot. This can be very painful and might need to be surgically removed by your health care provider. Treatment includes avoiding constipation by drinking plenty of fluids and eating more fiber. Most of the over-the-counter hemorrhoid medications are safe in pregnancy. Your health care provider can often prescribe you stronger medications if needed.