Henna Tattoos. Good for a 15 year old?

Umm i never got a henna tat before. I always got the real thing. My first was when i was 15. But to answer your question they do wash off in about 5-6 days. You could go to any beach and you will see at least 5 stands doing them. They a popular. It will irritate your skin only if you are illergic to the chemical they mix with the ink they use.