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 has officially been linked to a rare and irreversible lung disease known as bronchiolitis obliterans, more commonly referred to as popcorn lung. This condition causes scarring and inflammation of the small Vaping and Popcorn Lung: What You Need to Know About a Hidden Risk Life threatening bronchiolitis related to electronic cigarette use in a Canadian youth CMAJ