A lot of dandruff, and very itchy, how to do

Patients with more dandruff, and accompanied by itching, which may be caused by pityriasis scalp phenomenon, followed by seborrheic dermatitis may be caused, if the scalp with fungal infection, you can use ketoconazole lotion to clean the hair, and then oral compound vitamin b tablets treatment. If it is caused by psoriasis, you can use zinc pyridion spray treatment.