A skin tag is a small, soft, painless, noncancerous growth attached to the skin by a stalk. Tags usually occur spontaneously and may grow on any part of the body; common sites are the neck, armpits, around the groin, and under the breasts.
Tags usually cause no problems, although they may bleed or become sore if rubbed by clothing. They are harmless and do not need treatment, although troublesome ones can be removed by a doctor by burning, freezing, or cutting them off.