2. Regurgitation
This is also an essential symptom along with the pain. Regurgitation means that the contents of the stomach return to the esophagus and sometimes reach the throat causing a sensation similar to that of vomiting. But why does it happen? For the same reason that acid regurgitates: there’s an alteration in the stomach sphincter, which is supposed to close the lid and prevent this from happening.
This sphincter is a ring-like muscle that divides the stomach and the esophagus. It is called cardia. A signal goes through the esophagus when you swallow your meal, and the sphincter opens to allow food in. It rapidly closes to prevent regurgitation. But in some patients, the cardia muscle weakens, and its function is lost. This leads to a continuous return of stomach acid to the upper portions of the gastrointestinal tract.