Reflux, more commonly called acid reflux or gastroesophageal reflux, is a bothersome condition that develops because of a problem in the lower esophagus. In people who suffer from reflux, the lower esophageal sphincter opens spontaneously instead of keeping the contents of the stomach in the stomach. When the stomach contents are regurgitated, the esophagus can become irritated and inflamed, causing the symptoms commonly associated with reflux. The condition is common and can affect anyone, but obesity, pregnancy and hiatal hernias are among the risk factors fore developing reflux, according to Penn State University's Milton S. Hershey Medical Center.
Heartburn
A common symptom of reflux is heartburn, also called acid indigestion. In some cases, the heartburn can be severe and may also cause pain in the back, neck, arms and jaw, according to the Hershey Medical Center. When heartburn develops, the stomach contents--partially digested food and acid--are regurgitated and can also lead to a sour taste in the mouth.
Chest Pain
Chest pain is also a symptom of reflux, according to MayoClinic.com. For many sufferers, the pain is experienced behind the breastbone in the lower or middle part of the chest. In some cases, the pain can be felt in the abdomen.
Difficulty Swallowing
Another symptom of reflux is difficulty swallowing. For some people, swallowing can also be painful because of the condition.
Cough
A chronic cough, especially a dry cough, that is not related to an illness or medical condition can also be a sign of reflux, according to the National Digestive Diseases Information Clearinghouse. Some people also experience asthma-like symptoms that are associated with reflux.
Sore Throat
Acid reflux can also cause a sore throat or hoarseness because of the regurgitation associated with the condition, according to the Hershey Medical Center. In some cases, people may also feel as though there is a lump in the throat.


