T Gel Nizoral Dry Itchy Head Full Of Flakes...Help Please!!!?

Dry Itchy Head full of flakes...Help Please!!!? - t gel nizoral

I have a very bad completely dry scalp with itchy scales. It's really bad. If I had my hair should be shaken like a snow storm. Shampoo and I do my best to take care of him, but the problem seems to worsen. I have tried T-Gel, Nizoral, Head and Shoulders, Selson blue and none of them worked. I am looking for a good shampoo or preferential treatment.