An umbilical hernia appears in the navel or near it, which is a naturally weak spot in the anterior abdominal wall. These hernias can occur in infants, due to the failure of the umbilical ring to close, but because of the weakness in this area they also develop in adults, regardless of age. Overweight, increased intra-abdominal pressure from excessive coughing, chronic constipation, or pregnancy are cited as causes. In adults, an umbilical hernia is treated only surgically.