Popcorn lung: What is it, and who is at risk? Harvard Health Vaping Safety, Smoking, Dangers, Pros, Cons, Debate, E cigarettes, & Tobacco Britannica Does Vaping Cause Popcorn Lung? What is Popcorn Lung? Popcorn Lung is a serious, permanent lung disease caused by inhaling harmful chemicals like diacetyl, sometimes found in flavored vapes. Tips for Parents & Caregivers: Talk Popcorn Lung: A Dangerous Risk of Flavored E Cigarettes American Lung Association