Infant umbilical hernia is caused by a congenital weak abdominal wall around the navel, leading to protrusion. It generally does not require special treatment methods. As long as care is taken to avoid the child's intense or prolonged crying, actively treat gastrointestinal diseases to prevent increased abdominal pressure that could lead to protrusion, no special treatment is usually necessary. This is because 80% of children with umbilical hernias will see their hernia rings gradually shrink or even close as they grow older, typically by the age of two. Surgical treatment might only be needed if the hernia ring is very large, such as more than two centimeters in diameter, or if the obvious umbilical hernia persists after the age of two.