Hidden Dangers of Vaping: The Diacetyl Connection Doctors have linked vaping to a rare, incurable lung condition called obliterative bronchiolitis, often referred to as popcorn lung. The disease permanently scars and narrows the lungs' airways, causing lifelong breathing problems. Do Geek Bars Give You Popcorn Lung Do Cigarettes Cause Popcorn Lung Popcorn Lung Reversable At Raymond Stucky Blog What Causes Chemical Concerns: Which Vapes Contain Diacetyl?