2FIRSTS The Dangers of Health E Cigarettes for Lung Damage: Study E cigarettes disrupt lung function and raise risk of infection PET imaging shows greater lung inflammation in e cigarette users than cigarette smokers 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.