The scalp appears large white dandruff consider the following kinds of initiation: 1, hair red furfur: can appear in the scalp area similar to seborrheic dermatitis rash, such as erythema, scales, in other parts of the circumference can see the consistency of the follicle papules, the phenomenon of keratinization at the top, in clinical treatment can apply selenium disulfide shampoo shampoo, also can apply trimethoprim ointment or hydrocortisone acetate ointment for treatment If the keratinization is more obvious, you can take oral Avia capsules to strengthen the anti-inflammatory, anti-proliferative, immunomodulatory treatment; 2, common psoriasis: mostly due to genetic factors, the treatment can be topical spray carbotriol application.