Is Diacetyl in Vapes? Crystal Vape & Crystal Bar & SKE Vape Official Station Doctors Say Vaping May Be Causing 'Popcorn Lung' Does Diacetyl in Vaping Cause Popcorn Lung? Clutch Vape Are Geek Bars Safe: A Look At Disposable Vapes And Vaping Risks It's official. Flavored e cigarettes cause permanent lung damage. And doctors are already seeing it happen. In the United States, a teenager developed something called popcorn lung after secretly vaping for three years. Does vaping cause lung cancer? UT MD Anderson