Experts show that flavored e cigarettes cause irreversible lung damage. A U.S. teen developed "popcorn lung" after secretly vaping for 3 years a permanent, life altering disease. Officially known as bronchiolitis obliterans, the Do Geek Bars Have Diacetyl? EightVape Disposable Vapes Myths Vapor Shop Direct Do Geek Bars Have Diacetyl? EightVape 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. Popcorn Lung and Vaping: Debunking the Myths Asia Harm Reduction Alliance