It is not contagious. Causes Unknown, but it may be hereditary. These commonly occur in association with allergic dermatitis. Papules are clustered. Each one is about 1 mm in size.
Papules are at the openings of hair follicles.
They can be scooped out with the fingernails. When scooped out, a papule usually contains a coiled hair inside of white, semisolid material. Papules don't itch or hurt. Risk Factors History of skin allergies. Family history of keratosis pilaris.