Sorry about the late reply. Are you still experiencing the itching? If I am not mistaken, your last derm said you don't have male pattern baldness. If that is the case then you should start out with non-medicated shampoos like Nizoral, T/Gel, or T/Sal if you haven't tried any of them yet. Other things to keep in mind are the type of products that you put on your hair/scalp and the frequency of washings. I am sure that you realize this, but it is imperative that you eliminate what's causing that itch since it's causing you to shed. There are other things that I would also do if I were in your shoes but I would definitely start with those.