Do You Suffer From Heartburn or Acid Reflux? Gastro-oesophageal reflux disease( GORD) is a condition where the lower oesophageal sphincter (or LOS – the muscular ring at the lower end of the oesophagus) is abnormally relaxed and allows the stomach’s acid contents to flow back or reflux into the oesophagus. It can also cause heartburn. … Continue reading Sussex Health: Heartburn & Acid Reflux