If you don't know, the fish pedicure is just like it sounds: you put your feet in a tub of water filled with tiny fish who eat your dead skin.
According to an American Medical Association report, a woman had this done, then shed her toenails.
She had no history of toenail problems.
While it's not clear the flesh-eating fish caused it, experts have warned in the past that fish pedicures may carry a risk of infection.