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Increased levels of stomach acid aren't actually listed as causes for GERD anywhere I could find. It is listed as a cause for ulcers, but not GERD: Increased levels of gastrin can cause increased release of acid and may lead to ulcers (Zollinger-Ellison syndrome) [Stomach acid test - What Abnormal Results Mean] Gastroesophageal reflux disease occurs ...


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Firstly, I would be reluctant to ascribe those symptoms (recurrent oral canker sores) to acid reflux. In very severe reflux acid can make its way up the oesophagus and can cause chemical burns to the throat and mouth, but there would also be other related symptoms, like nausea, indigestion, heartburn, persistent coughing (caused by acid irritating the larynx)...


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