Experts warn that flavored e cigarettes can cause irreversible lung damage, as seen in a U.S. teenager who developed "popcorn lung"a severe and permanent condition called bronchiolitis obliteransafter secretly vaping for three years. Does Vaping Cause Popcorn Lung? Amazon.com: Every Vape You Take (Laminated Poster)18" x 24" inch (Tobacco Prevention) : Office Products Popcorn lung: What is it, and who is at risk? Harvard Health E Cigarettes Vaping with Juul & Other Electronic Cigarettes