Hiatal Hernia and Acid Reflux

A hiatal hernia is one of the more common, and more commonly misunderstood, physical contributors to acid reflux. It happens when part of the stomach pushes up through the diaphragm, the muscle that separates the chest from the abdomen, into the chest cavity. Many people have one without ever knowing it, since a small hiatal hernia often causes no symptoms at all, but a larger one can make reflux considerably more likely and harder to manage with diet alone.

How a hiatal hernia contributes to reflux

Normally, the diaphragm helps reinforce the valve covered in what causes acid reflux, adding extra pressure around the lower esophageal sphincter to help keep stomach contents down. When part of the stomach slides up through the diaphragm opening, that reinforcing pressure is weakened or lost, making it easier for acid to move upward, and sometimes changing where symptoms are felt.

Types of hiatal hernia

• Sliding hiatal hernia, the most common type, where the stomach and the junction with the esophagus slide up and down through the diaphragm opening, often coming and going with position and pressure
• Paraesophageal hernia, a less common but potentially more serious type where part of the stomach pushes up alongside the esophagus and stays there, which can sometimes need surgical evaluation even without severe symptoms

Symptoms that suggest a hiatal hernia might be involved

Many people with a hiatal hernia have the same symptoms as ordinary reflux, heartburn, regurgitation, and a sour taste, but some notice reflux that’s harder to control with usual lifestyle changes, or chest discomfort that’s more noticeable than typical heartburn. Since chest discomfort overlaps with more serious causes, it’s always worth reading our guide on acid reflux and chest pain to know when that symptom needs urgent attention rather than being assumed to be reflux.

How it’s diagnosed

A hiatal hernia is typically found during an endoscopy (a camera passed down the esophagus) done to investigate reflux symptoms, or sometimes incidentally on an imaging test done for another reason. It isn’t something you can self-diagnose from symptoms alone, since the same symptoms overlap heavily with ordinary reflux that has no hernia involved at all.

What helps, with or without surgery

For smaller hiatal hernias, the same lifestyle measures that help general reflux, smaller meals, avoiding lying down soon after eating, weight management, and raising the head of the bed, are usually the first approach, sometimes alongside medication. Many people manage symptoms this way without ever needing surgery. Larger or symptomatic paraesophageal hernias are more likely to come up in a surgical consultation, since the anatomy itself, not just acid, is part of the problem in those cases. A structured lifestyle plan, like the one covered in our review of The Acid Reflux Strategy, can be a reasonable complement to whatever your doctor recommends for a diagnosed hernia, though it isn’t a substitute for the anatomical evaluation a hernia specifically may call for.

FAQ

Does everyone with a hiatal hernia get acid reflux?

No. Many people have a small hiatal hernia with no symptoms at all, and it’s often found incidentally rather than because of reflux complaints.

Can a hiatal hernia go away on its own?

Small sliding hernias sometimes fluctuate with position and don’t necessarily need treatment, but a hernia itself generally doesn’t resolve without intervention if it’s causing significant symptoms.

Do I need surgery if I have a hiatal hernia?

Not necessarily. Many people manage symptoms with lifestyle changes and medication. Surgery is generally reserved for larger hernias or cases where other treatments haven’t worked.

How is a hiatal hernia different from regular acid reflux?

Regular reflux happens without a structural cause, while a hiatal hernia is a physical opening in the diaphragm that can make reflux more likely or harder to manage with diet alone.