An abnormal condition in which part of the stomach protrudes upward through the esophageal cleft in the diaphragm, sometimes causing a backflow of acid stomach contents into the esophagus.
- Pain areas: in the abdomen or chest
- Gastrointestinal: belching, heartburn, hiccup, nausea, regurgitation, or vomiting
- Also common: throat irritation
It is usually caused by a weakness of the diaphragm muscle. You may not have any symptoms with your hiatal hernia. However, sometimes, hiatal hernias may cause acid reflux or gastroesophageal reflux (gerd), which is when stomach acid backs up into the esophagus.