I am not sure what I have one docter said I had scalp psoriasis and the other said its sehboric dermatitis or however u spell it! I have thick crusted scalp that used to be small and now grew bigger and im afraid that it will come on to my forehead! What is it what do I do docters gave me medications topical solutions it seams only to get the scales off for the night by the time my head drys its thick again and it white over redish skin ! What do I do what is it is it going to cover my whole scalp or even come out onto my face?