According to Inside Edition, the latest TikTok challenge has teens smoothing their teeth down with nail files. This is obviously a terrible idea, but dentists are trying to get the word out to impressionable teens to make sure they understand that.
Dentists warn that this sort of DIY procedure will do irreversible damage your enamel and leave you with very sensitive teeth, pain, and likely the need for root canals.
One girl who spoke to Inside Edition confirms that it wasn't painful when she did the filing, but that her teeth are now extra-sensitive and that cold drinks and ice cream are painful.