This usually closes up soon after the baby is born. Sometimes it doesn't, and an umbilical hernia forms. It's unclear exactly why this hole, called the umbilical ring, doesn't close in some babies.

You may also notice your baby is an "outie." This may be an umbilical hernia, meaning the area around the navel sticks out because of weak muscles around the belly button. This never causes pain ...

When he was just three months old, Lucy Muthoni's son, who is now six years old, developed a swelling on his umbilical cord which expanded whenever he cried. "My son used to cry and sometimes ...