The clinical types of extra-abdominal hernia include: 1. inguinal hiatal hernia, which is a disease caused by the relaxation of the abdomino-femoral canal, where the intestinal canal, omentum, and bladder in the abdominal cavity reach below the skin along the canal. 4. femoral hernia, which is caused by the protrusion of the hernia sac through the femoral ring and femoral canal into the fossa ovalis, and is common in older women. 5. white line hernia, which is caused by a weak muscle junction, and is common in women who have given birth, as well as other types of hernia, such as incisional hernia, parastomal hernia, and lumbar hernia.