Hernias that occur in the groin are known as inguinal hernias. These are characterized by small balloon-like pouches protruding from the groin region. These form at a natural point of weakness at the intersection of abdominal muscles. The protrusions occurs when a loop of intestine or fat passes through this weak point and either enters the inguinal canal or pushes out just medial (more in the middle) to the inguinal canal. Men usually suffer from inguinal hernias developing in the groin, and may notice an ambiguous discomfort or even a bulge in the scrotum. Infants and children also suffer from inguinal hernias when a part of the lining of the abdominal cavity called the peritoneum does not close properly. This leads to a bulge in the groin because the intestine or other abdominal contents may push into the opening when the pressures inside the abdomen rise.