anyone dealing with Brachioradial Pruritus

I have been dealing with this most of my adult life and it's finally got aggressive effecting my sleep and health in general. My neurologist has been treating me for the past 3 or 4 years. I have just terrible itchy skin on my arms, back, and head that drives me nuts. The neurologist says it's the nerves in my neck that cause this and I have been getting nerve block in the neck for 2 years now. Finally they quit working (shots) so they have stopped giving me to them. I can find no relief accept ice and I just have terrible nights no sleep. Has anyone dealing with this. Find any type of Dr that has new ideas.