Umbilical hernia is primarily due to the weak abdominal wall at the navel, allowing abdominal contents to pass through and protrude at the surface, forming a lump. In children under two years old, if the umbilical hernia does not cause incarceration or significant redness and swelling on the skin's surface, bathing is generally not affected. In adults, umbilical hernias usually do not heal on their own and often require surgical treatment, otherwise, the hernia tends to enlarge. As long as the umbilical hernia does not cause significant incarceration requiring emergency surgery, or local inflammatory skin reactions, it does not affect the patient's ability to bathe. Even if surgery is necessary for an umbilical hernia, it is considered an elective procedure.