Hello,
It can due to seborrheic dermatitis or adult cradle cap, eczema or psoriasis skin, Treatment for all the three is entirely different. Seborrheic dermatitis is usually caused by overgrowth of Malassezia furfur. This skin disease commonly affects adolescents
. Oral antifungal drugs and immunomodulators such as tacrolimus and pimecrolimus are used in very severe cases. I sincerely hope that helps. Take care.