Canadian teen develops 'popcorn lung' like vaping illness, unlike U.S. patients Is Popcorn Lung Caused By Vaping? Popcorn lung: What is it, and who is at risk? Harvard Health Popcorn lung" is the nickname for bronchiolitis obliterans. It is a condition that damages your lungs' smallest airways and makes you cough and feel short of breath. It's sometimes caused by breathing The Truth About What Vaping Is Doing to Your Body American Lung Association Popcorn Lung and Vaping: Debunking the Myths Asia Harm Reduction Alliance