Seborrheic Dermatitis

Seborrheic dermatitis is generally limited to the scalp; however, dry scales and underlying erythema can occur on the face, ears, chest, back, and body folds. Skin may be dry or oily. In infants, a widespread reaction is associated with minimal discomfort. The yeast organism, Pityrosporum, may be a factor. Mild scaling without any erythema is often termed simple dandruff. Tinea capitis may simulate dandruff or seborrheic dermatitis, and scrapings should be taken for KOH examination and fungal culture, especially in children, if hair loss is present.