Umbilical hernia can heal on its own, generally, if the appropriate treatment method is chosen, most umbilical hernias can heal within six months. For children over two years old, if the umbilical hernia has not healed and the diameter of the umbilical ring exceeds 1.5 cm, active surgical treatment is also chosen. For children over five years old, surgical treatment is recommended regardless of the situation. Umbilical hernia occurs because the umbilical ring does not close in time during the child's development, causing the abdomen to protrude. The common treatment method is to choose a coin or cardboard larger than the umbilical ring, wrap it up, press against the umbilical ring, and fix it with adhesive tape to prevent it from moving. This treatment method generally works well and can avoid surgery. However, during the observation process, it is necessary to avoid the occurrence of incarceration or rupture of the hernia.