Umbilical hernias can cause pediatric spitting up. Umbilical hernia is caused by incomplete atresia of the umbilical ring or insufficiently tough umbilical scar, and the belly button will bulge out when the abdominal pressure increases, which is the most important manifestation of umbilical hernia. This is because when the abdominal pressure increases, the intestines can protrude through the weak umbilical ring into the abdominal wall, causing intestinal intussusception, which in turn leads to spitting up in the child. In this case, prompt medical attention is needed, and the contents of the hernia should be removed to relieve the child’s symptoms. Most umbilical hernias are self-healing, but if the hernia has not healed by the age of two, surgery should be considered, as well as surgery in the event of an incarcerated umbilical hernia. If an umbilical hernia is detected, early non-surgical treatment can be taken, such as using a hernia belt, or wrapping coins in gauze and tying them to the navel to reduce the protrusion of the intestinal tubes, which in turn can reduce the incarceration and prevent other complications. However, there are scholars who believe that umbilical hernias under 2 years of age do not require special treatment unless they become incarcerated and other discomforts.