Well, I seem to have the same problem...only in a different area. I have been itching like crazy on my left arm and my the thumb on my left hand. Itching that won't go away even when scratched. There's no rash.....no nothing....just itching. I've heard that MS legions in certain areas of the brain can cause this. I haven't done any research on it, though. Maybe I will now. I've used cortizone cream and it helps a little but not enough.

Hopefully someone knows the answer. I'm sorry you're having such a rough time.