Can i use listerine a week after i got my tongue ?

Tongue pierced?: If that is what you are asking, then usually the answer would be yes (try non-alcohol version) and only use it if you've had no complications during the healing period. If in doubt, see your dentist. Please be aware, if you were pierced, that you have a greater chance of chipping your teeth.

Yes: Pierced? You should be fine. If it is a bar-bell use plastic ends. The metal ends break teeth.