I know for a fact that I grind my teeth at night, and I'm not sure if this may have something to do with it, but on the left front tip of my tongue, about an inch wide, I have a spot with no tastebuds. I've has this spot for a few years, but it has gotten bigger, about double its size. It's happened gradually, so I wouldn't be surprised if it were from me grinding my teeth. It doesn't hurt at all. Does any one know why this could be happening?