A Warm, Buttery Flavor and a Risk of Irreversible Lung Damage What Does Vaping Do to Your Lungs? Johns Hopkins Medicine 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 High School Cheerleader Left with 'Deadly Diagnosis' After Secretly Vaping for 3 Years