Cradle cap, the common term for infantile seborrheic dermatitis, causes scaly patches on a baby's scalp. Though cradle cap isn't serious, it can cause thick crusting and white or yellow scales.
Cradle cap usually resolves on its own within a few months. Self-care measures, such as washing your baby's scalp daily with a mild shampoo, can help loosen and remove the cradle cap scales. If cradle cap persists or seems severe, your doctor may suggest a medicated shampoo, lotion or other treatment.