I got my tongue pierced when I was 16. It healed really quickly, I never had any problems with it. I took it out almost a year ago, and I'm sure I could still put something back in if I wanted. But, this is not a piercing that people won't notice at first. Mine didn't even swell very much, but it takes you a few months to talk, and eat normal. I didn't get a lisp, but it it hard to talk because now you have a long piece of metal in your mouth, and you can't move your tongue to pronounce words very well, at first.
I also have my lip pierced, and I have had more problems with that one.
It's the whole tip of her tongue.
Like, a big part of her tongue? Or a small part?
My sister had hers odne. It actually healed up really fast. The only bad side effect and permanant one was that part of her tongue is numb- forever!