Medically reviewed by Michael Menna, DO A complication with belly button piercings is rejection, or when your body tries to remove the piercing from your skin. This is an immune response—your body ...

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.

Different types of belly button infections can cause different symptoms, but most skin infections cause redness, tenderness or pain, and swelling. You may also have pus, drainage or discharge, or skin ...