It scratches off tiny T-shirt fibers and directs them towards the belly button. So that might be one mystery solved, but lint isn't the only thing inside these bizarre human crevices. Your belly ...

There are several potential reasons for pain around the belly button. Read on to learn what they are and how to treat belly button pain.

Doctors weigh in on the pros and cons of navel pulling, an ancient practice that's going viral because of claims it helps with digestion, cramps and more.