Umbilical hernia can cause babies to cry because it might lead to incarceration, although the chance of this occurring is generally low. It is more likely to happen when there's a sudden increase in abdominal pressure in children. In cases of incarceration, if it involves the small intestine, it can cause the child to experience abdominal pain, bloating, constipation, etc. Therefore, the baby may cry. Crying might also aggravate the incidence of incarceration. So, for umbilical hernias with noticeable protrusion, it is important to soothe the patient promptly and avoid vigorous activities. One can use a coin or cardboard larger than the umbilical ring, cover it, hold it against the ring and secure it with adhesive tape to prevent it from moving and the hernia from protruding. This method can generally be used until the child is two years old, because umbilical hernias in children can heal by themselves before this age. If the umbilical ring is still relatively large after two years, timely surgical treatment should be considered.