Oct 5, - 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.Moles and Your Skin · Types of Moles · How Do I Know if a Mole Is · Skin Tag. Jan 15, - Let's face it: moles, skin tags, and warts are irritating. Plus, they can be confusing. Most people just don't know the difference between them.