Gastro-oesophageal reflux disease (GORD) is a disease in which acid from the stomach flows back (refluxes) into the oesophagus (gullet) causing irritation and sometimes damage to the lining of the oesophagus. 

The most common symptom is heartburn, but stomach pain and a taste of acid in the mouth can also occur. 

Treatment depends on the severity of the symptoms and may involve lifestyle changes and/or acid reducing medications.

For further information see the Gastroenterological Society of Australia website.