Hey Sarah707, I’ve never heard of there being an age limit for laser hair removal before (well, for someone who’s 18, I know any younger they won’t perform it on). By the time you’re 18 you’ve pretty much stopped growing so you won’t be getting more hair (or much of it) as you reach your early 20’s.
I’ve had both laser and IPL done and finding a place that wasn’t dodgy was the most stressful experience due to the amount of horror stories out there.
I’m not sure what location your’re in or what your budget is but this will be a good place to start. Have a figure in mind that you want to spend and try find somewhere that has reputable reviews.
Before going somewhere don’t be afraid to call them up and ask them some questions about the machine they’re using and what training they’ve done.
All in all there aren’t too many bad places around, but you just need to be careful and make sure you aren’t going to a place just because it’s cheap. If the people doing the laser hair removal don’t seem like they know what they’re doing just leave, it’s not worth the risk.