The game is played by putting salt on the skin, pressing ice on top of it and holding it in place until the ice melts or until the pain becomes too severe. Numerous people have posted YouTube videos of themselves participating in the challenge, which experts say can cause severe burns to the skin, similar to frostbite.
I am embarrassed to say my son played this game in high school. He has multiple large white scars down his arm where he burned off his freckles. I was livid when he came home with the burns as big as a silver dollar sometimes bigger. This is worth discussing with your kids. I never knew about it until after the fact....Leaves really horrid scarring....Kids do amazingly dumb things at times....IMHO