Gastroesophageal Reflux:

It is usually caused due to mucosal damage caused by acid of the stomach which comes up from the stomach to the esophagus.

Regurgitation of the contents of the stomach into the esophagus, possibly into the pharynx where they can be aspirated between the vocal cords and down into the trachea; symptoms of burning pain and acid taste result; pulmonary complications of aspiration depend on the amount, content, and acidity of the aspirate.

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