Experts warn that flavored e cigarettes can cause irreversible lung damage, as seen in a U.S. teenager who developed "popcorn lung"a severe and permanent condition called bronchiolitis obliteransafter secretly vaping for three years. Smoke Vape Causes Lung Disease E cigarette Stock Vector (Royalty Free) 1580147245 Shutterstock E Cigarette or Vaping Product Use Associated Lung Injury: A Comprehensive Review Harmful Effects of Vaping Chart Health Edco Respiratory Impact of Electronic Cigarettes and Low Risk Tobacco