"**Heartburn**" is a typical symptom of reflux esophagitis, usually causing a burning discomfort behind the sternum. It often occurs after meals, especially after large meals. The regurgitated material may have an acidic or bitter taste and occasionally contains small amounts of food. This can also happen at night, often waking individuals from a sound sleep. The symptoms are relieved or disappear after taking antacids. Swallowing pain and...