I have had a bad case of that. Not only did my tounge burn, but so did my whole upper mouth. In fact my whole upper mouth was swollen. It went away on its own after about
a week or so. I havent had it back since *knock on wood*. I wish I could tell you how to get rid of it, but all I know is that I was off nexium at the time. I started back on it before the symptoms dissappeared. Don't know if that was what did it or not.
Feel well soon!