For a few years now, little bumps will just appear on my tongue. They are like taste buds, but swollen or something. Sometimes I can't see them and sometimes the are kinda white, like they have a pimple head. Does anyone know what causes these? They drive me nuts, because when I have a sore in my mouth I have a bad habit of not being able to leave it alone. I am stumped. Anyone know what is going on here?