A bulging belly button is supposed to be an umbilical hernia, which is mostly seen in children, that is, newborn babies and toddlers. The bulge is found in the umbilicus when the baby cries because the umbilicus has not completely healed and the abdominal contents (mainly small intestine) have entered the subcutaneous area through the defect in the umbilicus, which is manifested as a bulge. Generally, the texture is soft, and the mass can enter the abdominal cavity after pressing with the hand, but after releasing the hand, the baby cries and the mass reappears. However, it can also be seen in adults, and in adults, surgical repair of the umbilical hernia is required, as conservative treatment is not effective. In the case of infants and children, conservative treatment can be used, which means that the hernia belt is tied. There are more hernia belts available on the market. In the early stage, a large hernia bag is used to press the belly button, and then the contents of the belly button are incorporated into the abdominal cavity and the hernia belt is tied tightly. After half a month or so, when the defect of the navel is reduced, a smaller hernia bag can be used to press the navel and the umbilical hernia can usually heal on its own in about a month.