A skin tag is a small flap of tissue that hangs off the skin by a connecting stalk. Skin tags are not dangerous. They are usually found on the neck, armpits, under the breasts, or in the groin area. Skin tags appear most often in women, especially with weight gain, and in elderly people. Skin tags usually don't cause any pain, but they can become irritated through physical contact with clothing or jewelry.
A dermatologist can remove a skin tag by cutting it off with a scalpel or scissors, with cryosurgery (freezing it off), or with electrosurgery (burning it off with an electric current).