Is it possible to snort meth and it chemically burns your tongue? if so how? can you treat it at home or do you need to go to a hospital?

Yes: Because your nasal passage is connected to your throat where the base of your tongue resides. If it is a severe burn I recommend you go to the ER as your tongue and throat could swell compromising your airway. If you can't breath you can't live.

GO to ER: You don't know what chemicals are in the drugs. YOU should go in to the ER and be checked.