Lungs After Smoking: Understanding Popcorn Lung from Vaping Yes, vaping is toxic. A U.S. teen developed "popcorn lung" after secretly vaping for three years a permanent, life altering disease. Officially known as bronchiolitis obliterans, the condition scars the lungs' tiniest E cigarettes can result in 'Popcorn Lung' Does Vaping Cause Lung Cancer? Can vaping damage your lungs? What we do (and don't) know Harvard Health Vaping Related Illness and Lung Disease NEJM