Having moles on the skin is very common. moles are small lumps on the surface of the skin. They are usually small and vary in color from brown, skin-colored, black, or reddish. They are usually on the neck, chest, back, armpits, under the breasts, or in the groin area.
Most moles on the skin, being very common, are not dangerous. They are made up of loosely arranged collagen fibers and blood vessels, and surrounded by a thick edge or thinned epidermis. The marks on the skin can appear smooth or slightly wrinkled and range in size from 1 mm to 5 cm.