A teen recovering from severe burns is warning his peers of the latest viral trend. 

The so-called “salt and ice challenge” involves putting table salt on exposed skin and placing an ice cube on the salt, which causes a burning sensation similar to frostbite. Teens are challenged to hold both the salt and ice in place as long as they can tolerate the pain. 

“For me, I didn’t really know what it was,” said 15-year-old Tristen Tinnes, who tried it with a group of friends earlier this week. “I just want to say, like, it’s not smart— obviously.”

Tinnes said the challenge left him and another friend with second and third-degree burns on their forearms.  The two may need skin grafts to repair the damage, KCRG reported. 

“We’ve talked a lot about it in three days. These challenges are there, I feel, to make children fail. Then the world tells them degrades them,” said Tinnes mother, Fanny Hartwig. “My son is a lot smarter than what he did.”

“It’s a chemistry experiment on your own skin,” said Dr. Thomas Granchi, the director of the University of Iowa Hospitals and Clinics Burn Treatment Center. “I certainly admire their curiosity. But, there are chemistry labs to study chemistry. Don’t turn your body into a chemistry lab.”