<unk>  <unk>  is a more serious form of<unk><unk>  (GER), which is common. GER occurs when the lower esophageal sphincter (LES) opens spontaneously, for varying periods of time, or does not close properly and stomach contents rise up into the esophagus. GER is also called acid<unk>  or acid regurgitation, because digestive juices—called acids—rise up with the food. The esophagus is the tube that carries food from the mouth to the stomach. The LES is a ring of muscle at the bottom of the esophagus that acts like a valve between the esophagus and stomach.
When acid<unk>  occurs, food or fluid can be tasted in the back of the mouth. When<unk> ed stomach acid touches the lining of the esophagus it may cause a burning sensation in the chest or throat called heartburn or acid indigestion. Occasional GER is common and does not necessarily mean one has<unk> . Persistent<unk>  that occurs more than twice a week is considered<unk> , and it can eventually lead to more serious health problems. People of all ages can have<unk> .
Gastroesophageal reflux disease
Peanut allergy
Odynophagia electrocardiogram
Helicobacter pylori infection
Esophageal candidiasis
Esophageal motility disorder
Atrophic gastritis
Barrett's esophagus