I have extreme itching only on my scalp. This has gone on for 1 month now. I have had a cortisone shot, followed by an oral dose of prednisone for the itching, as well as used medicated shampoo. I have seen a doctor as well as a dermatologist. I went to a different doctor this week who did blood work, and we are waiting for the results. I am also taking hydroxizone, .25 mg several times per day, and at night. Nothing is relieving the severe itching. My scalp does not have flakes, is not red, does not have a rash, etc. What could this be, and why is nothing working to give me relief?