I don't know what's going on with my itchy hair after washing my hair.

After washing the hair, it is also suspected that itching or seborrheic dermatitis is more likely, mainly because the head oil secretion, pore blockage caused, there may be folliculitis stimulation caused; should go to the regular hospital dermatology examination, if diagnosed as seborrheic dermatitis, can use ketoconazole drugs for treatment.