This type of hernia occurs when the stomach bulges up through the diaphragm into the chest cavity.

The link between heartburn and hiatal hernia
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Frequent acid reflux can irritate and inflame the esophagus lining, causing heartburn. And when the muscle tissue surrounding the esophageal sphincter weakens, it can cause the upper part of the stomach to bulge up through the diaphragm into the chest cavity. This is called a hiatal hernia.

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