What causes gastroesophageal reflux disease?

Answer 1

The cause is a backflow of contents of the stomach into the esophagus that is often the result of incompetence of the lower esophageal sphincter. Gastric juices are acidic and therefore produce the burning painful sensation in the esophagus.

Answer 2

Gastroesophageal reflux disease (GERD) is typically caused by the weakening of the lower esophageal sphincter, a muscle that acts as a valve between the esophagus and stomach. When this muscle relaxes inappropriately or becomes weak, stomach acid can flow back into the esophagus, causing symptoms such as heartburn and acid reflux. Other factors that can contribute to GERD include obesity, hiatal hernia, and certain lifestyle habits such as smoking and consuming certain foods and beverages.