Your lungs can't tell the difference between smoking and vaping Vaping can scar your lungsand the long term damage? Still not fully known. Comment LUNG and we'll DM you a video Does vaping cause lung cancer? UT MD Anderson Vaping refers to the act of inhaling and exhaling aerosol, often called vapor, produced by an electronic cigarette or similar device. These devices heat a liquid that usually contains nicotine, flavorings, and What Happens When You Quit Smoking and Start Vaping?