Gas In Stomach Operation My Partner Has Stomach Pains?

My partner has stomach pains? - gas in stomach operation

Well, he drank a beer and is now with stomach pains, which is actually caused by the gas. It is difficult to quickly rid of gas and has never been able to burp, because of an operation when I was a little boy. If you normally have this kind of stomach pain is usually not disappear until the next day. He tried all kinds of pills that help get rid of gas, but they seem to work well, so that no one knows more natural way to get rid of gas? Pls help ....