How old do you have to be to have your tongue peirced?

Old enough to fully understand all the implications of having this done.

In the United States, for the most part, the legal age is 18 without a parent or guardian.

that is dangerous the stud or whatever you have in your tongue could fall out and you could choke on it getting your tongue pierced is stupid ears yes but tongue that's fool hearty

It is not dangerous as long as you tighten the ball everynight.The ball is also not big enough to choke on. If you know how to care for it is very safe
16 is a standard basic age for tongue piercing with parental consent. No one will pierce a tongue younger than that due to the level of facialdevelopment. The jaw and face are still growing and changes are still occurring orally, so piercing a tongue younger than 16 is professionally wrong.