Reflux, also known as GERD (gastro-esophageal reflux disease), is a common problem. It's particularly prevalent as we age, with about 20-30% of the adult population in the U.S. experiencing symptoms on a weekly basis. Heartburn, a sense of burning pain in the esophagus and chest, is the most common symptom, but some people also experience nausea, vomiting, trouble swallowing, chronic cough and insomnia. Although GERD is generally not dangerous about 1% of people who have a di