What is dandruff
Dandruff is a natural process involving shedding of dead skin cells from the scalp. Although it is a minor problem, but when this shedding starts at an excessive rate it may cause some concern.
Excessive or severe dandruff with itching is known as seborrheic dermatitis. It affects scalp, forehead, naso-labial fold (smile line or laughter line), eyelash, eyebrows, skin behind the ears, trunk and flexures (armpit, elbows). It requires medical treatment.
Cradle cap is the term used when seborrheic dermatitis affects the scalp of infants. It occurs within a week or two after birth. It is characterized by dirty, yellow crusts on the top of head (vertex) with little or no itching. The condition usually subsides by itself.