I got a tongue piercing and im having problems.for day 3 and 4, i had a painful bump.at the end of day 4, it went away from drinking a lot of water.today, my mouth is dry and pus is coming from under.i do what my piercer recomended. what should i do?

Time to see doc. An infection appears likely vs inflammation caused by presence of foreign body. Best to see your pediatrician who will have access to your previous history, allergies, etc.

Infection. Have piercing removed. If site does not immediately begin to clear see an Oral Surgeon or an ENT. Tongue piercings By the way over time piercing would do damage to teeth, supporting tissues, as well as tongue.