Hi...?I never got heartburn from vape, it could possible an individuals reaction from the type of juice used or nicotine strength. What I did experience at first and I hear is a lot of coughing at first. It lasted a couple weeks. People here told me it is all that tar being expelled from the lungs after stopping tobacco. Now I can see how much junk I had in my lungs after 50 years of cigarette smoke. It is really disturbing now to think about all those years inhaling smoke. I used to say \ oh, it's just a little cigarette smoke /.. I am 65 and vape only for a month now and I feel like I am 45 again.