Popcorn Lung vs. Lung Cancer: Understanding the Critical Differences (and Why It Matters) A Warm, Buttery Flavor and a Risk of Irreversible Lung Damage 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, Popcorn Lung (Bronchiolitis Obliterans): Causes & Treatment Health Risks of Vaping: Electronic Cigarettes Now and Later Alabama Cooperative Extension System Health experts are sounding the alarm about a serious condition linked to vaping, known as "popcorn lung" or bronchiolitis obliterans. This irreversible lung disease is caused by harmful chemicals, like diacetyl, found