The scalp hair may be absent, sparse, fine, lightly pigmented (very blond), slow growing or abnormal in texture. The hair may also be fragile and unruly, stick out in all directions, get extremely knotted and difficult to comb. The hair may be dry because the oil glands are absent or poorly developed. As shampoo will dry the hair it may be better to wash with bath oil as this will help the hair lie down and will help when tackling knots. Some individuals choose to wear wigs but that can stop heat loss from the scalp, which in turn makes temperature control more difficult.
Seborrheic dermatitis or seborrhea, specifically seborrhea that occurs on the scalp, is a very common condition in children as old as 3 and adults alike, regardless of age or race. It causes thick white or yellow scales on the scalp; some children just experience scales in a small patch while others have scales all over their heads.