This can be a good and bad thing. I've felt "nauseous" and having that feeling that I need to throw up, then nothing will come, just dry heaving. With the lapband you can't physically vomit because your band won't allow anything to come back up through it that has already made it in the lower part of the stomach. It's a terrible feeling but for me, the dry heaves only last a couple of minutes and the feeling is then gone. Hope this helps.