Experts say that flavored e cigarettes can cause irreversible lung damage. A U.S. teen developed "popcorn lung" after secretly vaping for 3 years a permanent, life altering disease. Officially known as bronchiolitis obliterans, A toxic, plastic problem: E cigarette waste and the environment Health effects of electronic cigarettes Wikipedia E Cigarette How E Cigarettes Work, Health Risks & Teen Use The evidence is clear: Young E cigarette users suffer from respiratory symptoms American Lung Association