Skin Tags, also called acrochordons, cutaneous papillomas and fibroepithelial polyps, are small, usually flesh (may be brown) coloured bumps on your skin that are on a stalk called a "peduncle". They form in places where your skin creases or rubs i.e. your neck, armpits and groin. They are made up of loosely arranged collagen fibres and blood vessels surrounded by a thickened or thinned-out epidermis. Skin Tags may be either smooth or irregular. They can be found singly or in multiples. They are small and grow slowly, and should never grow to more than about 0.5" in size. Skin tags don't usually cause problems, but you may choose to have them removed for cosmetic or practical reasons if they catch on clothing or jewelry.