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 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 Vaping lung illnesses: Lab tests find bad chemicals in e cig liquids Beware of Popcorn Lung Due to Vape