Vape Mythbusting: Debunking 7 Common Myths Fact One of the most serious and least discussed dangers of vaping is a condition known as popcorn lung, medically called bronchiolitis Instagram 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 It's a Fact. Vaping Can Cause Popcorn Lung Poster ToucanEd Canadian teen develops 'popcorn lung' like vaping illness, unlike U.S. patients