Where does the excess gas come from while belching?

Question

most of the gas come from while swallowing, but when a person has gastritis there s excess production. wher does this come from?

Answer 1

While eating or drinking too fast we thereby swallow too much air, which goes to the stomach. This excess air is expelled through belching. Burps can also be caused by drinking carbonated drinks such as beer, soft drinks, or champagne, in which case the expelled gas is carbon dioxide from the drink itself.

Answer 2

Your stomach.

Answer 3

It's built up in your stomach. Imagine a soda bottle. The top is your mouth, the neck is your esophagus & the bottom is your stomach. It comes up from your stomach.

Answer 4

It is the waste product of various bacteria in your digestive system.  

Answer 5

its air you have swallowed while eating or drinking