Hi Susan--Yes, I have cervical (neck) osteoarthritis. The Doctor told me that due to this the nerves can be pinched, thus causing the scalp nerve endings to itch. I am fortunate in that I have no pain, only itching. He prescribed a topical solution (clobetasol) to put on my scalp--hopefully this will calm the nerve endings and thus resolve the itching. This sadly, if it works, will be a maintenance type of resolution--as it will not end it. If this does not work I am to call him and he prescribe a second topical drug. Sounds similar to what you are experiencing---was just so strange that he hit on the cause after looking at my scalp and not seeing any irritation or flaking--he knew right away what to ask me.