Experts say that flavored e cigarettes can cause irreversible lung damage. A U.S. teen developed "popcorn lung" after secretly vaping for 3 years a permanent, life altering disease. Officially known as bronchiolitis obliterans, What You Should Know About E cigarettes and EVALI CASAA Vaping Alert: A Hidden Danger to Your Lungs Recent medical research and case studies have linked vaping to a serious condition called bronchiolitis obliterans also known as popcorn Popcorn Lung: The Deadly Secret in Your Vape! Did you know that the sweet, tempting flavor in your e liquid could be hiding a chemical called Diacetyl? This chemical, which tastes Chinese vaping firm RLX raises $1.4 billion in U.S. IPO sources Reuters RELX Infinity Pods CiggiesWorld