The doctor explains that the procedure includes a small incision made at the base of the belly button ... hernia," Stanford Medicine Children's Health states. About 20 percent of babies are born ...

We hope you'll never need to know this—but in case symptoms of a hernia ever creep up, a Cleveland Clinic surgeon reveals ...

Normally that opening seals up after you're born, but, in some cases, it never really closes all the way. This can allow internal organs to slip through, creating a bulge behind your belly button.