Many young mothers and senior mothers find the symptoms of umbilical hernia in infants after giving birth to their babies and are often very worried, so it is important to know what the symptoms of umbilical hernia are so that they can be examined by a doctor in time. 1. The main clinical manifestation of an umbilical hernia is the formation of an outwardly protruding mass in the umbilicus, mostly hemispherical or cylindrical in shape, with a small scar at the top of the mass, which is marked by the umbilical cord. The mass is usually rarely more than 4 cm in diameter and it is characterized by reversibility, i.e., it increases in size when crying, coughing, and it is more solid. When the child is quiet or when the parents press with their hands, the mass shrinks or returns to the abdominal cavity, and some loose skin wrinkles are left after the mass retreats. 2. Unlike inguinal hernia, most umbilical hernias have no other discomfort, sometimes with indigestion or intestinal cramps, but only a few may have intestinal tubes stuck in the umbilical cord loop. At this time, the sick child cries, vomits, and the abdominal X-ray shows signs of intestinal obstruction. In this case, parents should take the child to the hospital as soon as possible to prevent necrosis of the stuck intestinal tube. 3. There are also a few sick babies with atypical umbilical hernia, where a swollen lump appears above or below the navel or even on the side of the original navel.