Do NOT put hydrogen peroxide on it. You will make it worse because you will dry out the piercing and kill the good and bad bacteria, not what you want. If the pus is a white to slight yellowish color that is normal, it is your white blood cells and plasma doing their jobs. Just make sure to rinse with mouthwash that has been diluted to about 50% with water. If the puss is any other color that white to yellowish or if there is a lot (to the point you can taste it) call your piercer and schedule an appointment to go back in.
No peroxide! mouth wash more than you were, and call your piercer.Does it hurt more when you get your tongue pierced, or when you get your bellybutton pierced?
Put hydrogen paroxide on it.Can I put numbing cream on my tongue that I just got pierced?