instituteofhumananatomy AN ABDOMINAL HERNIA is a bulge or protrusion of an organ or part of an organ through the abdominal wall. Some of the common types of hernias are inguinal (groin) and umbilical (belly button) hernias. . . Inguinal hernias are the most common of all hernias and are more common in men. This is due to the testes originating in the abdominal cavity during embryonic development, then descending and naturally “herniating” into the scrotal sac. . . Umbilical hernias occur at or n