Popcorn Lung Causes, Symptoms, Diagnosis, and Treatment Popcorn lung: What is it, and who is at risk? Harvard Health It's official. Flavored e cigarettes cause permanent lung damage. And doctors are already seeing it happen. In the United States, a teenager developed something called popcorn lung after secretly vaping for three years. Does Vaping Or Smoking Marijuana Cause Lung Cancer? SERO Doctors Say Vaping May Be Causing 'Popcorn Lung' YouTube Popcorn Lung: A Dangerous Risk of Flavored E Cigarettes American Lung Association