Most belching is caused by swallowing excess air. This air most often never even reaches the stomach but accumulates in the esophagus. You may swallow excess air if you eat or drink too fast, talk while you eat, chew gum, suck on hard candies, drink carbonated beverages, or smoke.

Is it good to burp?

Our stomach has a lot of digestive acids and it releases gases during the process of digestion. And there are only two ways to get rid of it: farting or burping. So burping is actually healthy, because if this extra gas is not released from your gut then it can lead to bloating and severe abdominal pain.

What happens before you burp?

There your body uses acid, bacteria, and chemicals called enzymes to break it down into nutrients it uses for energy. If you swallow air along with your food or if you drink something like a soda or beer that has bubbles in it, those gases can come back up through your esophagus. That's a burp.