When part of the bowel or fatty tissue pushes through a weak area in the abdominal wall at the navel, an umbilical hernia forms.
Hernias come in a variety of shapes and sizes. A defect in the anterior abdominal wall, which lies beneath the umbilicus, or navel, causes an umbilical hernia.
These hernias are most frequent in infants and newborns, although they can also afflict adults. Although umbilical hernias are usually curable, they can become a dangerous problem in rare cases.
An umbilical hernia is a protrusion over the belly button that you can often see or feel. An umbilical hernia occurs when a section of the intestine forms a sac with fat or fluid. This sac makes its way through a hole in the abdominal wall muscle. In most cases, hernias in children do not cause pain.