Umbilical hernia is the most common type of abdominal hernia in children, and the majority of them heal spontaneously within 2 years of age. It is most commonly seen in children less than 3 months of age. The prevalence is higher in female infants, premature infants, constipated infants, and infants with frequent episodes of breath-holding (commonly known as “barking fits”, usually with bouts of straining and red faces). It is more common in girls. The swelling is full and enlarges when the abdominal pressure increases (or when crying) and shrinks when the abdominal pressure decreases (e.g., sleep) or retracts into the abdominal cavity, leaving a loose skin fold. Umbilical hernia is rarely herniated, and even if it is, it is easier to reset than inguinal hernia herniation, and most umbilical hernias heal spontaneously as the umbilical orifice decreases and the child cries less. If the umbilical hernia becomes smaller and the child is crying, the umbilical hernia belt can be used. If the umbilical hernia does not heal after 2-4 years of age and the umbilical aperture is large (more than 2 cm), or if there are adhesions between the viscera and the umbilical hernia sac (the contents of the hernia cannot be completely reset), and if a few atypical hernias persistently do not heal, umbilical hernia repair can be considered.