If an infant's umbilical hernia still shows obvious protrusion after two years of age, surgery is required. Another scenario that necessitates surgery is if the diameter of the hernia ring of the infant's umbilical hernia is relatively large, such as more than 2cm, as generally, it cannot heal by itself. However, over 80% of infant umbilical hernias do not require special treatment or surgery. As age increases and nutrition is maintained, the subcutaneous tissues around the abdominal wall's umbilical hernia ring can repair and narrow, leading to healing.