Popcorn lung, or bronchiolitis obliterans, is a serious and irreversible pulmonary disorder caused by the inhalation of diacetyl, a chemical used to give popcorn and other snacks a buttery flavor. The disorder causes inflammation and scarring of the tiny air sacs in the lungs, which leads to coughing, wheezing, shortness of breath, and other respiratory symptoms. Popcorn lung can be fatal if left untreated, and there is no known cure.
The chemical diacetyl is not only used in popcorn, but also in a number of other products, including microwaveable popcorn, candy, and e-cigarette liquids, and it has been linked to other respiratory illnesses, such as asthma and chronic obstructive pulmonary disease (COPD).
Popcorn lung is a serious and potentially fatal condition, and it is important to recognize the symptoms and seek medical attention if you experience any of them. It is also important to be aware of the potential risks of exposure to diacetyl, and to avoid products that contain this chemical if possible.