What causes burping? "When we swallow food or drinks, it goes through a tube called the esophagus and into the stomach," explains Dr. Schneider. "It's there that stomach acid and digestive enzymes work to break food down into nutrients that we use for energy. Gas is created in this process." We can also swallow air along with food or drinks. The condition is caused by a malfunctioning cricopharyngeus muscle, which essentially acts as a gate between the esophagus and the throat. The muscle stays tightly closed but opens while swallowing One reason why you may burp when you yawn is because of the way your body works. When you yawn, your mouth opens wide and your diaphragm (a muscle that separates your chest from your abdomen) contracts. This can cause air to be swallowed and trapped in your stomach, leading to a burp. Burping or belching can be a symptom of acid reflux, also called gastroesophageal reflux (GER). Excessive burping can also cause other reflux symptoms, such as heartburn. Acid reflux, or GER, Carbonated beverages and swallowing air are the most common reasons people burp. Most of the time, that gas doesn't make it to your stomach. Instead it stays trapped in your esophagus until it Inability to burp or belch occurs when the upper esophageal sphincter ( cricopharyngeus muscle) cannot relax in order to release the "bubble" of air. The sphincter is a muscular valve that encircles the upper end of the esophagus just below the lower end of the throat passage. qvKqS.

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