What is the Link Between Popcorn Lung and Vaping? The Dunken Law Firm Popcorn Lung & Vaping Finally Debunked! What is Popcorn Lung? Popcorn Lung is a serious, permanent lung disease caused by inhaling harmful chemicals like diacetyl, sometimes found in flavored vapes. Tips for Parents & Caregivers: Talk 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, Does Vaping Cause Popcorn Lung? The Facts Explained