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When the junction and part of the stomach is located above the diaphragm it is called a hiatal hernia. The condition is common in patients with gastroesophageal reflux disease. Patients with a hiatal hernia have a weak muscle at the gastroesophageal junction, making the gastroesophageal reflux worse. Severe chest pain after eating. 2  This is often the case when there is a large hiatal hernia with all or most of the stomach located above the diaphragm. 3  This symptom suggests that the stomach is twisting. 4  Twisting causes the blood flow to the stomach to be too low.
Overview. A hiatal hernia is a condition in which a small part of your stomach bulges through a hole in your diaphragm. This hole is called a hiatus. Itâs a normal, anatomically correct opening that allows your esophagus to connect to your stomach.The cause of a hiatal hernia is usually unknown.verview. A hiatal hernia is a condition in which a small part of your stomach bulges through a hole in your diaphragm. This hole is called a hiatus. Itâs a normal, anatomically correct opening that allows your esophagus to connect to your stomach.