Gastroesophageal reflux disease, or GERD, occurs when the muscle located at the end of your esophagus--called the lower esophageal sphincter (LES)--does not close properly. Your esophagus is the tube that carries food from your mouth to your stomach. Because your LES does not close properly when it should, your stomach contents leak back, or reflux, into your esophagus and irritate it. Gastroesophageal reflux disease Symptoms Most people who have gastroesophageal reflux disease feel a burning sensation in their chest or throat....

Hiatal hernia is a digestive problem in which a part of your stomach protrudes through the opening of your diaphragm. Your diaphragm is a thin sheet of muscle that helps your breathe. It also separates your chest from your abdomen. The opening in your diaphragm, called the hiatus, is normally just large enough to allow your esophagus to pass, but prevents your stomach to push upward beyond your diaphragm. The esophagus is the tube connecting your mouth to your stomach. Causes Hiatal Hernia The true cause of hiatal hernia...