Popcorn lung: What is it, and who is at risk? Harvard Health 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 Vaping: Understanding the Risks and Impacts on Health Popcorn Lung: Causes, Symptoms, Cure & Lifespan Lungs After Smoking: Understanding Popcorn Lung from Vaping Popcorn Lung: Causes, Symptoms, Cure & Lifespan