The child’s belly button bulges out, the medical diagnosis is considered to be umbilical hernia, its due to the child’s congenital umbilical abdominal wall weakness, the development of the umbilical cord caused by the unsoundness of the umbilical bulge. When the child because of violent crying or the existence of digestive diseases, intestinal gas increased intestinal pressure increases, the umbilicus will bulge out. At this time, all of them can be healed naturally as the child grows and matures, only a small number of children after the age of 2 years, if there is still obvious umbilical hernia or the diameter of the hernia ring is larger than 2cm or more, usually can not be healed naturally, and need to be treated with surgical intervention. Umbilical hernias usually do not require special treatment, as long as attention is paid to preventing the child from crying for a long time, as well as actively preventing and treating the child’s digestive system can be.