Sometimes Tik Tok can actually be used for the good of humanity... like good recipes or fun dances!
The latest Tik Tok trend has doctors concerned! It's called the 'scalp popping' challenge.
So basically, someone takes a chunk of your hair, twists it around their finger, and YANKS it as hard as they can! But the point isn't to actually rip the hair out of your head... it's to SEPARATE your scalp from your skull!
Whenever they do this, there's a POPPING sound, and for some reason teenagers think its great.
That sound is actually the soft tissue under your skin literally ripping from your skull **OUCH**
Doctors are warning people to STOP doing this, because it can cause bleeding under your scalp, or create a sore on your head!