Experts say that flavored e cigarettes can 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, Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times Can vaping damage your lungs? What we do (and don't) know Harvard Health Popcorn lung how vaping can scar your lungs for life RCSI University of Medicine and Health Sciences Does vaping cause Popcorn Lung? Vaperite