If you're pregnant, you are likely experiencing a great number of hormonal imbalances and shifts, especially in the third trimester of the pregnancy. Your pelvic veins experience a lot of pressure from the uterus expanding to accommodate the growing baby. The inferior vena cava is a major vein that travels along the right side of your body; its purpose is to carry blood through your body, and straining it can in turn put pressure on your anal veins, making conditions ideal for you to experience a hemorrhoid. You are much more at risk for getting a hemorrhoid when you are pregnant than under other conditions. Pregnancy causes the hormone progesterone to increase production and swell your vein walls. You can even become constipated through progesterone production, which is yet another thing that can cause hemorrhoids in most pregnant women.
