I was at my dermatologist a week ago. I am on 2nd prescription of prednisone and it helps a bit. He said it is most likely the new shampoo I was using, but after 2nd visit (still itchy) he was not sure and said to go to Mayo Clinic. I am red and itchy in head, neck, forehead, around nose, chin, arms, back, chest, abdomen and one leg on top. I am always prickly. I am very itchy most of the day. No clear area on my body to do allergy patch tests says doc. This has been going on for 3 1/2 months. It does not wane or disappear. The red fades but always comes back when I am moving around I made a list of the things I have used new at the onset that I don't use now of course. This is just a horrible guessing game. Nothing relieves the itch. I've tried, clay, baking soda, and the creams from my Dr. are safe to use though and help.