I have a friend with very sever IBS and he has the same problem, but very badly, not just when he burps. It can make it rather hard to be around him as he doesn't seem to smell it and takes the attitude that people should just accept that this is how he is. Work-wise it has also caused him big problems. Being a friend I did bring the subject up with him and apparently he was told by a nurse that this is common in IBS sufferers and that he should ask his doc tor help, but he never did. I would suggest you talk to your GP about this and see if there is something he can suggest. Otherwise, if you are going to see your specialist anyway at some time ask him / her. Best wishes. :o)