The scabs, the white flakes and the itching goes in favour of seborrheic dermatitis, i.e. dandruff. To keep the scalp clean regular cleansing is advised, i.e. daily cleansing of your scalp with a mild shampoo or anti dandruff lotion depending on the severity of the flakes is advised. Oiling few hours before head bath is advised, to keep the scalp dry free.
source
