What you may be experiencing: One of the most dreaded side effects of pregnancy, varicose veins do not strike every woman. These bluish, reddish, or purplish lines or bulges under the skin tend to run in families. They can occur at any time in a person's life, but tend to crop up during pregnancy when the weight of the uterus puts greater pressure on the veins in your lower body. They most often pop up on the legs. When they occur in or around the rectum, they're called hemorrhoids. You may not feel varicose veins at all, or they may be sore or itchy. You may not like the way they look but, in most cases, they aren't a health problem, and they generally diminish a bit after delivery, though they probably won't disappear.