What is a naval hernia?

Umbilical hernia : It is protrusion of something (usually fat but can b bowel as well) through the belly button. Umbilical cord comes through there and sometimes never closes (kids w umbilical hernia) or for adults it closes but with increased pressure( lifting, straining, coughing, pregnancy etc), it will reopen and cause hernia.

See below: Umbilical hernias (navel hernia) can be either congenital or the result of weakening in that area due to increased pressure and abdominal wall thinning (e.g. Pregnancy or obesity), surgical incisions or other causes. This results in protrusion of abdominal contents, most commonly preperitoneal fat or omentum, through the defect. Occasionally intestine can protrude into the defect.