<unk>  is a chronic inflammatory disease of unknown cause characterized by 1–2 mm, discrete and uniform, shiny, flat-topped, pale flesh-colored or reddish-brown papules that may appear as hypopigmented against dark skin. Occasionally, minimal scaling is present or can be induced by rubbing the surface of the papules. The disease usually affects children and young adults and is painless and usually nonpruritic, although protracted itching may occur in some cases. It is sometimes referred to by dermatologists as "mini lichen planus".
Lichen nitidus
Pearly penile papules
Lichen scrofulosorum
Lichen myxedematosus
Lichen spinulosus
Acne cosmetica
Pomade acne
Tinea barbae