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“Keeping Up With the Kardashians” star Kylie Jenner is going through the typical teenage, rebellious stage. The 17-year-old youngest sister of Kim is also regularly changing up her look, including making her lips look way bigger than normal.

How does she achieve this plump look? Jenner says her look is natural, but it has been reported she uses makeup to make her mouth look larger.

Alarmingly, teens around the country are getting into the trend, using a shot glass or smaller glass to suck in their lips to cause swelling, USA Today reports.

Using the hashtag #kyliejennerchallenge on Twitter, teens posted their bruised pics online over the weekend.

i screwed up. #kyliejennerchallenge #uhoh 😷 pic.twitter.com/Mdf4bcZdUP

— zoë (@_zoeymcguire) April 20, 2015

It’s not only scary that these teenagers have gotten their hands on shot glasses, but this process is causing serious pain and scarring around the mouth. Kids, don’t try this at home!