Acid Reflux/Indigestion Causes and Treatment: Acid reflux, also known as indigestion or heartburn, is a condition where stomach acid flows back into the esophagus. This can lead to a burning sensation in the chest, often referred to as heartburn. Indigestion typically involves discomfort or pain in the upper abdomen and may include symptoms like bloating, belching, and nausea.
The lower esophageal sphincter (LES) is a muscle that separates the esophagus from the stomach. It normally opens to allow food to enter the stomach and then closes to prevent the backflow of stomach acid into the oesophagus. When the LES doesn’t function properly, stomach acid can rise into the oesophagus, causing the symptoms associated with acid reflux.