Life threatening bronchiolitis related to electronic cigarette use in a Canadian youth CMAJ Vaping and Popcorn Lung: What You Need to Know About a Hidden Risk Doctors are warning about a rare but serious lung condition linked to vaping, known as popcorn lung (bronchiolitis obliterans). The disease causes permanent scarring in the lungs' smallest airways, leading to ongoing E Cigarette Use, Small Airway Fibrosis, and Constrictive Bronchiolitis NEJM Evidence Does vaping damage lungs Zeptive