The most common type of groin hernia. A swelling is found which is usually made up of the lining of the abdominal cavity known as the peritoneum (or sac) and overlying fat and skin. The peritoneum has passed through an area of weakness in the inguinal canal.
Two subtypes of inguinal hernia are identified (direct and indirect) depending upon the exact anatomical position of the sac in relation to other structures. One or both types may be identified within a groin swelling, both require repair. The sac may contain fat, bowel or other intra-abdominal structures.