What Does Vaping Do to Your Lungs? Johns Hopkins Medicine Does vaping cause popcorn lung? Allen Carr's Easyway What is Popcorn Lung? Popcorn Lung is a serious, permanent lung disease caused by inhaling harmful chemicals like diacetyl, sometimes found in flavored vapes. Tips for Parents & Caregivers: Talk Medical professionals are warning about bronchiolitis obliterans, commonly called "popcorn lung," a serious and permanent lung condition increasingly associated with vaping. The condition damages the smallest airways in the lungs, causing symptoms