Navel stones are an accumulation of sebum and keratin that can resemble a large blackhead in your belly button. A navel stone is a hard, stone-like object that forms inside your belly button (navel).

Everyone has a belly button. It’s the small fold of skin that formed in your abdomen after the umbilical cord was clipped at birth. Belly buttons can be concave (innies) or convex (outies). ‌ Most of ...