what can cause excessive belching
The most common normal cause of belching is excessive gas in the stomach that comes from swallowed air. However, discomfort in the abdomen for any reason also may lead to excessive belching. Therefore, belching does not always indicate the presence of excessive gas in the stomach. It is not difficult usually to differentiate between excessive gas in the stomach and other causes of excessive gas.
But one of the more unusual, and less worrisome symptoms of anxiety is excessive belching. Belching can be caused by a variety of gastrointestinal issues, but anxiety is also one of the more forgotten causes. Anxiety - especially severe anxiety - can change the way you breathe and how you digest, both of which can lead to belching and burping.