Medically reviewed by Michael Menna, DO A complication with belly button piercings is rejection, or when your body tries to ...

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.

This article was originally published on mentalfloss.com as Yes, You Need to Clean Your Belly Button-Here's the Best Way to Do It. Haphazardly dragging a soapy washcloth or loofah over your abdomen ...