seborrheic dermatitis is most common in infants within the first two months of birth
appears as erythematous, greasy yellow scales most commonly on the scalp (cradle cap), and may also occur on the face
most cases resolve spontaneously within weeks to months, but severe cases may be treated with 1% hydrocortisone cream, sahmpooing with selenium sulfide, and using an emollient to remove scales
in extreme cases, consider hte possibility of Langerhans cell histicytosis, especially if atrophy, ulceration, or purpura are also present
rarely occurs in children between 1 and 12 as they do not have active sebaceous glands, but will appear as dandruff in adolesecents
