What Are Skin Tags? A skin tag is a tiny, benign, outpouching of skin that is typically connected to the underlying skin by a thin stalk. Skin tags look like tiny bits of hanging skin and typically occur in sites where clothing rubs against the skin or where there is skin-to-skin friction, such as the underarms, neck, upper chest, and groin. Skin tags are not present at birth and their frequency increases with age.