An umbilical hernia occurs when part of your intestine bulges through the opening in your abdominal muscles near your bellybutton (navel). Umbilical hernias are common and typically harmless.
Umbilical hernias are most common in infants, but they can affect adults as well. In an infant, an umbilical hernia may be especially evident when the infant cries, causing the bellybutton to protrude. This is a classic sign of an umbilical hernia.
Children's umbilical hernias often close on their own in the first two years of life, though some remain open into the fifth year or longer. Umbilical hernias that appear during adulthood are more likely to need surgical repair.