Recent medical research and case studies have increasingly linked vaping to bronchiolitis obliterans, a rare, irreversible, and potentially fatal lung disease often referred to as popcorn lung. This condition causes permanent scarring Is There A Link Between E Cigarette Use And 'Popcorn Lung'? While vaping is not risk free, it is less harmful than tobacco Our World in Data A Warm, Buttery Flavor and a Risk of Irreversible Lung Damage