Vaping lung illnesses: Lab tests find bad chemicals in e cig liquids One of the most serious risks of vaping? A condition called popcorn lung, or bronchiolitis obliterans. It's rare, but when it hits, it's permanentscarring the smallest airways in the lungs and causing The Truth About What Vaping Is Doing to Your Body American Lung Association 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