Skin tags are harmless growths that hang from the surface of your skin. They range in size from 1mm to 1cm and are made of collagen fibres and blood vessels surrounded by skin. Skin tags tend to form in places where skin rubs together. They are commonly found on the eyelids, neck, armpits, under the breasts, or in the groin https://www.vcareskinclinic.com/skin-tags.php