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 Popcorn Lung: The Price Jack Paid for a Cloud of Vapor Longevity Doctors Say Vaping May Be Causing 'Popcorn Lung' The Truth About Vaping And Popcorn Lung Inhalation Toxicology Of Vaping Products And Implications For Pulmonary Health Is Vaping Causing Popcorn Lung Australia Ontario teen's vaping injury consistent with 'popcorn lung,' study suggests CBC News High School Cheerleader Left with 'Deadly Diagnosis' After Secretly Vaping for 3 Years