Ventral or abdominal hernias occur when the intestine pushes through a weakening in the abdominal wall. They are frequently referred to as incisional hernias because the bulge often occurs at the site of a previous surgical incision.
Any one of these hernias may be recurrent. This means, simply, that a previously repaired hernia has returned. People with especially weak abdominal walls or multiple surgical sites may simultaneously suffer from a combination of types of hernias.