Popcorn lung: What is it, and who is at risk? Harvard Health Does Vaping Cause Lung Cancer? Popcorn lung. Vaping lung injury. Lets stop confusing the two., Popcorn lung is the lazy name for bronchiolitis obliteransa disease of the small airways, not the alveoli. , It got its name from Flavored e cigarettes are not harmless. Doctors are now seeing teens with permanent lung damage from vaping. In the U.S., a teenager developed popcorn lung after vaping in secret for three years. This