CDC recommends that you should not use e cigarette, or vaping, products that contain THC, particularly from informal sources. Data suggest these products play a major role in the current lung injury outbreak. Yes, vaping is toxic and the consequences can be permanent. A U.S. teenager developed popcorn lung a life altering, incurable condition after secretly vaping flavored e cigarettes for E Cigarette User Has Rare Form of Lung Scarring Typically Found in Metal Workers E Cigarette or Vaping Product Use Associated Lung Injury: A Comprehensive Review