It is very unsightly.
Cradle cap is a skin condition which commonly occurs on the scalp of infants.
The medical term is seborrheic dermatitis, which is just a fancy name for irritation around the oil-producing sebaceous glands of the skin. It usually shows up in the first month, and generally goes away within a few months. It looks like scaly, yellow flakes. It may give the appearance that your child's head is dirty or has a bad case of dandruff. In more severe cases, the areas involved may include the ears, forehead and eyelids.