Pregnancy tumors usually disappear on their own after the baby's birth. However, if the tumor interferes with eating, your dentist or a specialist may choose to remove it. This involves a simple procedure performed under local anesthesia. It should be kept in mind that even if the tumor is removed during pregnancy, it redevelops in about half the cases. If the lump is not removed, your dentist will try to determine the possible cause that triggered the tumor's development -- such as plaque buildup -- and remove it.