Acid reflux: the cause of the symptom of heartburn the stomach is protected against strong acid , but the gullet ( oesophagus ) is not so when acid regurgitates upwards into the oesophagus, there is a burning pain in the centre of the lower part of the chest acid reflux commonly occurs in hiatus hernia. Acid reflux meaning. Reflux definition is - a flowing back how to use reflux in a sentence.
acid reflux meaning
