Vaping: A Toxic Breath Poster NIMCO, Inc. A Warm, Buttery Flavor and a Risk of Irreversible Lung Damage Life threatening bronchiolitis related to electronic cigarette use in a Canadian youth 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. Popcorn Lung vs. Lung Cancer: Understanding the Critical Differences (and Why It Matters)