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The release of gas through the mouth, which represents an adaptive relaxation triggered by a build-up of intragastric air pressure due to an accumulation of gas, especially from carbonated drinks, such as soft drinks, beer and champagne. The sound itself is caused by vibration of the upper oesophageal sphincter.

Upper abdominal discomfort due to excess swallowed air may extend into the chest, mimicking heart or lung disease; in guinea pigs, belching is mediated by nitric acid release from non-adrenergic non-cholinergic nerves.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.


1. To expel gas from the stomach through the mouth; to eructate.
2. An act of belching; eructation.
Medical Dictionary, © 2009 Farlex and Partners

Patient discussion about belch

Q. Is it an ulcer? I am worried! Hi friend, I'm 35 year old male and recently I started to suffer from some strange symptoms I have never experienced. The first symptom was sharp pain in my upper abdomen that starts two of three hours after eating. In the beginning I thought it could be connected with some food intolerance but then I started to get this pain early in the morning, before any eating what so ever and all this was accompanied with nausea, frequent burping and weight loss. I have read some stuff about stomach ulcer and I could say that I poses almost every major symptom. Is there any way for me to be sure that I have developed disease of ulcer?

A. There is nothing you could do to check do you have ulcer or not by your self. Anyone who thinks he may have an ulcer needs to see a doctor because over time, untreated ulcers grow larger and deeper and can lead to other problems. So go now to the doctor.

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References in periodicals archive ?
Newcastle Crown Court heard how other carers had raised concerns about Plunkett's behaviour towards the disabled man, claiming she had belched in his face and put obstacles in his way as he walked.
They believe methane being belched out daily by cows and sheep is behind a quarter of the greenhouse gases pumped into the atmosphere.
Normally, the gas passes out through the rectum or is belched through the mouth.
If a dead pop star belched 20 years ago and somebody's got it on tape, it ends up in the shops showcased by a spiffy new mix.
This gas in the stomach may accumulate to be belched out or it may pass into the small intestine where part of it is absorbed.
HALF of the night sky is obscured by a blanket of cosmic dust "belched out" by exploding stars, experts said yesterday.
Some 55 million years ago, the planet belched up billions of tons of carbon-rich gas, sending an already warm climate into a feverish state.
Arizona State University climatologists point to car and factory emissions belched into the atmosphere all week as the cause.