A hernia occurs when an internal part of the body pushes through a weakness in the muscle or surrounding tissue wall.

An umbilical hernia appears as a lump near the navel (bellybutton) that may get bigger when your child laughs, coughs, cries or goes to the toilet. It may shrink when your child is relaxed or lying down.
Umbilical hernias are very common and affect 10% of infants and young children. They are especially common in babies who are born prematurely.

An umbilical hernia is not painful. In 85% of cases, the umbilical hernia goes back in and the muscles reseal before the child's first birthday.

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