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. Risky Business: Which Vapes Can Lead to Popcorn Lung? Does vaping cause lung cancer? UT MD Anderson Understanding the Link Between Vapes, Geek & Elf Bars, and Bad Breath Do Geek Bars Have Diacetyl? EightVape