Vaping lung illnesses: Lab tests find bad chemicals in e cig liquids 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 Imaging Findings of Vaping Associated Lung Injury AJR It's a Fact. Vaping Can Cause Popcorn Lung Poster ToucanEd E Cigarette Use, Small Airway Fibrosis, and Constrictive Bronchiolitis NEJM Evidence A growing body of research now links vaping to a rare and incurable condition called bronchiolitis obliterans, commonly known as popcorn lung. The disease causes permanent scarring of the small airways in