From what my mom's doctor said, it isn't that serious. You just have to watch your eating habits and stress level. There are two types though, and I don't know a lot about the other type. I usually get on webmd for help. It is very good. Good luck.
Thank for the response lauren21. I've been researching the Web and thought it might be a Hiatal Hernia as well. It as a sudden onset, though. I hope it isn't something as serious as a hernia.
I do not know a lot about the situation, but my mom was having the same thing and she was diagnosed with a hiatal hernia, which is often directly under the xyphoid process. To diagnose the problem, doctors have to do endoscopy. There are two types of hiatal hernias though, so I woul check. Good luck with it, I hope she gets better.