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 Is it True That Vaping Can Cause Popcorn Lung? Freeman Vape Popcorn lung: What is it, and who is at risk? Harvard Health 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, Risk assessment of inhaled diacetyl from electronic cigarette use among teens and adults ScienceDirect