Health experts are sounding the alarm about a serious condition linked to vaping, known as "popcorn lung" or bronchiolitis obliterans. This irreversible lung disease is caused by harmful chemicals, like diacetyl, found 5 Common Vaping Myths Debunked With Facts Grey Haze UK 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, Popcorn Lung: A Dangerous Risk of Flavored E Cigarettes American Lung Association Lungs After Smoking: Understanding Popcorn Lung from Vaping Health effects of electronic cigarettes Wikipedia