coconut oil and aloe vera helps my dermatitis. i dont put it in the hair during the day because it makes the scalp more visible, but depending on your hair type, it might work out. i even rub it on the patches of dermatitis i get on my face and i rub it into my eyebrows which also get dandruff like flakes. after i apply the itch diminishes. when i couldnt find my coconut oil i resorted to olive oil which also provided some measure of relief from the itch / burning.
it is strange nizoral wouldnt help you. the keto should attack the fungus that causes much of the inflammation. the OTC nizoral is 1%. you could try a 2% Rx formulation