Experts show that flavored e cigarettes 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, the JUUL Is Unsafe. We Want You to Know Why. A recent case involving a U.S. teenager who developed Bronchiolitis Obliterans, commonly called popcorn lung, after three years of secretly vaping has raised serious concerns about the risks of e cigarettes. This irreversible 5 Common Vaping Myths Debunked With Facts Grey Haze UK