occurring primarily in childhood — usually from ages 8 to 12 — it consists of light patches over the cheeks and, occasionally, other areas such as the arms and neck. It also appears to be a marker for those who have eczema.

(PIT eh RYE ah sis AL buh): Seborrheic dermatitis.

Pityriasis alba is Latin for white, scaly patches and it is the most common cause for them in childhood. Children with this extremely common condition develop uneven, round or oval patches after sun exposure. The patches are dry with very fine scales.