swig, I get the tingling but not the burning from MS. Over time it's subsided and migrated, not constant and not always in the same place. It's good that you're becoming aware what triggers it though. The only thing I know for sure about mine is that it happens most frequently while I'm sitting or lying down.
Oh, and Tasia, I occasionally get the mad itching, too! Funny thing is that I can remember that happening up to a year before I was dxed but of course, I hadn't a clue at that time why it happened!