Popcorn Lung (Bronchiolitis Obliterans): Causes & Treatment What is Popcorn Lung? Dangers of Electronic Cigarettes & Vaping What is Popcorn Lung? Galaxy Vapes Inc. 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 Canadian teen developed 'popcorn lung' type injury from vaping report Reuters