gastroesophageal reflux disease or gerd occurs when the lower esophageal sphincter (les) does not close properly and stomach contents leak back or reflux into the esophagus. the les is a ring of muscle at the bottom of the esophagus that acts like a valve between the esophagus and stomach. the esophagus carries food from the mouth to the stomach. when refluxed stomach acid touches the lining of the esophagus it causes a burning sensation in the chest or throat called heartburn. the fluid may even be tasted in the back of the mouth and this is called acid indigestion. occasional heartburn is common but does not necessarily mean one has gerd. heartburn that occurs more than twice a week may be considered gerd and it can eventually lead to more serious health problems. anyone including infants children and pregnant women can have gerd.
what is gastroesophageal reflux disease (gerd)?