The belly button, it turns out, is one of the least-studied parts of the human body. But one of its great mysteries may now have been solved – why most people have an innie, or concave belly button.

That little dent in the middle of your stomach isn’t just a quirky reminder of your time in the womb, it’s potentially one of the most bacteria-packed spots on your entire body. Your belly button is ...

Rochelle Collins, DO, is a board-certified family medicine physician and assistant clinical professor of family medicine at Quinnipiac University. Discharge from your belly button might be a sign of ...