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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, chest, back, 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. However, they can become irritated if anything, such as clothing or jewelry, rubs on them. Read more about skin tags, moles, and freckles.