Dr Sunil Kumar K, Lead Consultant Interventional Pulmonologist at Aster CMI Hospital, Bengaluru, warned that Popcorn Lung (bronchiolitis obliterans) is a serious, irreversible lung disease often mistaken for asthma. Linked to chemical exposure and vaping, it causes chronic cough, breathlessness, and wheezing. Early diagnosis is vital, especially for vapers noticing persistent breathing issues.