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. Canadian teen develops 'popcorn lung' like vaping illness, unlike U.S. patients Popcorn lung: What is it, and who is at risk? Harvard Health Popcorn Lung Vape Warning: What You Need to Know Simpol.ph