<unk>  is a skin condition, a type of dermatitis, commonly seen in children and young adults as dry, fine-scaled, pale patches on the face. It is self-limiting and usually only requires use of moisturizer creams. The condition is so named for the fine scaly appearance initially present (pityriasis), and<unk>  (Latin for white) refers to the pallor of the patches that develop. The patches are not totally depigmented.
Pityriasis alba
Alopecia mucinosa
Pityriasis rosea
Phytophotodermatitis
Ichthyosis acquisita
Pityriasis rubra pilaris
Pityriasis amiantacea
Alopecia universalis