Often when I use meth(usually for a few days in a row), tiny white bumps appear on my tongue. They are small and actually look like pimples. They also seem to kinda cluster, so i might have 2 clusters of the white bumps on the side of my tongue and some single bumps in random places on the top of my tongue. They usually only last a couple of days after I stop using.These have appeared like 5 times, and a few days ago when I had them I scraped them off with my fingernail, and I have been using since then and they have not reappeared. Does anyone else ever get these, know what they are, or know a way to prevent/get rid of them?