Umbilical hernia is a type of hernia, mainly caused by poor development of the navel area and a relatively weak abdominal wall at the navel. It occurs when the intestines protrude through the belly button towards the surface of the body due to increased intra-abdominal pressure. The main treatments are as follows: if the infant or toddler is under two years old and the hernia is relatively small, it can be observed conservatively or it might close on its own. If the child is older than two years and the hernia is larger, surgical repair may be necessary. For adults with an umbilical hernia, surgical repair is generally the best treatment method.