Once we have eaten or drank a liquid the stomach then goes into action by using hydrochloric acid to break down the food and fluids as part of the body’s digestive system. Within the stomach our food is enclosed by the stomach lining which serves as a protective shield against this strong acid that is produced to break down our foods; acid reflux symptom however the esophagus leading to the stomach and where the food and fluids pass is not designed to deal with it. The heartburn arrives if even a small amount of this acid seeps past the stomach valve, which is like a one way valve, thus heartburn can occur.