How do you get rid of thrush when you have a tongue piercing?

Thrush is caused by over use of oral rinses or mouth washes. You were using mouth wash way too much and threw the oral bacterial balance out of whack. Stop using the mouth wash and see your doctor, you will not need to remove the jewellery, we just need to get the oral bacterial count back into balance and every thing will be fine. You doctor will recommend or prescribe a treatment, follow his/her instructions and ignore what your piercing studio told you because clearly there information caused your issue in the first place.