Understanding the Dangers of Vaping: Popcorn Lung and Diacetyl Risks What is 'popcorn lung' and is it linked to vaping? Yahoo Life UK Popcorn lung" is the nickname for bronchiolitis obliterans. It is a condition that damages your lungs' smallest airways and makes you cough and feel short of breath. It's sometimes caused by breathing 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