What is acid reflux? It is a commonly experienced condition often referred to as heartburn. A burning feeling in the chest area is the most common symptom. Stomach acid and enzymes rise up to the esophagus and causes reflux - also known as heartburn. This very strong acid breaks down food. In more severe cases that acid may reach the throat or mouth. … [Read more...] about Painful Acid Reflux and Apple Cider Vinegar