Popcorn Lung vs. Lung Cancer: Understanding the Critical Differences (and Why It Matters) 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. What Are Some Common Risks for Vaping? A Warm, Buttery Flavor and a Risk of Irreversible Lung Damage Vaping Linked to Permanent Lung Damage Ashok Yadav posted on the topic LinkedIn Vape appeal Australian Medical Association (NSW)