The pressure of the fetus in the abdomen, as well as hormonal changes, causes hemorrhoidal veins to enlarge. These veins are also placed under severe pressure during the birth of the baby. For most women, however, such hemorrhoids are a temporary problem. Often all that is needed to reduce symptoms is to include more fiber in your diet to soften the stool. Softer stools make it easier to empty the bowels and lessen pressure on the veins.
Good hygiene is also important.
Avoid a lot of wiping. If necessary, you can even use a bath or shower as an alternative to wiping. After bathing, dry the anus gently with a soft cloth or towel. It is a good idea to see your doctor any time you see bleeding from the anus. This is important to make sure you don't have cancer or some other disease of the digestive system.