An umbilical hernia is an extra-abdominal hernia in which the contents of the abdominal cavity protrude from the weak area of the umbilicus! Because the umbilicus lacks fatty tissue, it is the weakest part of the abdominal wall, so the abdominal contents can easily protrude from this area to form a hernia. After the umbilical cord of newborns cut off the umbilical cord in the odd veins and arteries cut off, fibrosis and its umbilical cord skin tissue phase healing, in the middle of the abdomen to form a weak area, and at the same time due to the bilateral rectus abdominis muscle before and after the sheath in the umbilical cord has not yet closed, the umbilical cord near the tissue tension is more relaxed, when the abdominal pressure increases, the abdominal cavity and the outward protruding from this part of the abdominal wall diverticulum formation of a diverticulum, that is, the umbilical hernia, in other words, all the factors causing the increase of abdominal pressure In other words, all factors that increase abdominal pressure may trigger an umbilical hernia, such as gastrointestinal flatulence, indigestion, crying, and holding the child in the wrong position. Umbilical hernias that are present since birth are considered to be the result of poor local tissue development. The vast majority of umbilical hernias are curable, and with age, the rectus abdominis muscle develops completely and the hernia hole gradually closes and heals spontaneously. Umbilical hernias are also less likely to recur after surgery. This is because as the skin’s ability to defend itself strengthens the fatty tissue in this area of the child’s body, it becomes less and less likely to recur, so it does not usually cause a recurrence.