When I was diagnosed with a hiatal hernia, my first reaction was panic. It sounded serious. Turns out, hiatal hernias are extremely common — many people have small ones without ever knowing it. But understanding the connection between a hiatal hernia and GERD helped me make sense of why my reflux was happening and what I could actually do about it.

What Is a Hiatal Hernia?

Your diaphragm is a large muscle that separates your chest from your abdomen. There's a small opening in it called the hiatus, which your esophagus passes through to connect to your stomach. A hiatal hernia happens when part of your stomach pushes up through that opening into your chest cavity.

It sounds alarming, but small hiatal hernias are incredibly common — some estimates suggest up to 60% of people over 50 have one. Most never cause any problems at all.

The Two Types

Sliding Hiatal Hernia

This is by far the most common type, accounting for about 95% of cases. The junction where your esophagus meets your stomach slides up through the hiatus. It can move up and down, sometimes sitting in the normal position and sometimes pushing up into the chest.

Sliding hernias are the type most associated with GERD symptoms.

Paraesophageal Hiatal Hernia

This is less common but potentially more serious. Part of your stomach pushes up through the hiatus and sits next to your esophagus. The junction between your esophagus and stomach stays in the normal position, but a portion of the stomach is displaced.

Large paraesophageal hernias can sometimes become strangulated (blood supply gets cut off), which is a medical emergency. If you experience sudden severe chest or abdominal pain, difficulty swallowing, or vomiting, seek medical attention immediately.

How a Hiatal Hernia Makes GERD Worse

The connection between hiatal hernias and acid reflux comes down to anatomy and mechanics:

It weakens the LES — the lower esophageal sphincter normally sits right at the diaphragm level, which helps keep it closed. When a hiatal hernia displaces this junction, the diaphragm can no longer help reinforce the LES, making it easier for acid to escape upward.
It creates an acid pocket — in people with hiatal hernias, acid can get trapped in the herniated portion of the stomach above the diaphragm. This puts acid right next to the esophagus with nothing to stop it from flowing upward.
It impairs esophageal clearing — normally, the diaphragm helps squeeze acid back down into the stomach. With a hernia, this clearing mechanism doesn't work as well, meaning acid stays in contact with the esophagus longer.
It reduces LES pressure — studies show that people with hiatal hernias tend to have lower LES resting pressure, which means the valve is weaker overall.

This doesn't mean everyone with a hiatal hernia gets GERD. Plenty of people with small hernias have zero reflux symptoms. But if you do have both, the hernia is likely making your reflux worse.

Symptoms to Watch For

Hiatal hernia symptoms often overlap with standard GERD symptoms:

Heartburn, especially after meals or when lying down
Regurgitation of food or sour liquid
Difficulty swallowing (dysphagia)
Feeling full quickly when eating
Chest pain or pressure (always get chest pain evaluated by a doctor)
Belching more than usual
Nausea after eating

Some people with hiatal hernias also experience silent reflux (LPR) — where acid reaches the throat and voice box without the typical heartburn sensation.

How Hiatal Hernias Are Diagnosed

Most hiatal hernias are discovered incidentally during tests for other conditions. The two main diagnostic methods are:

Upper endoscopy (EGD) — a camera on a flexible tube is passed down your throat to visually examine the esophagus and stomach. This can show the hernia and also check for inflammation or damage from acid exposure.
Barium swallow — you drink a chalky liquid and then X-rays are taken as it moves through your digestive system. This can show the hernia and how your esophagus is functioning.

If your doctor suspects a hiatal hernia based on your symptoms, they'll likely recommend one of these tests. They may also do pH monitoring to measure how much acid is reaching your esophagus.

Managing GERD With a Hiatal Hernia

The good news is that managing GERD with a hiatal hernia uses the same strategies as managing GERD without one — they just become even more important.

Lifestyle Changes

These are your first line of defense and they make a real difference:

Elevate the head of your bed — this is especially important with a hiatal hernia because gravity helps keep acid in the stomach. Aim for 6-8 inches of elevation. For more tips, see our guide on nighttime reflux.
Eat smaller, more frequent meals — large meals put more pressure on the hernia and the LES. Learning how you eat matters as much as what you eat.
Don't eat 2-3 hours before bed — lying down with a full stomach is a recipe for reflux, especially with a hernia.
Maintain a healthy weight — extra abdominal weight increases pressure on the hernia. Even modest weight loss can make a significant difference.
Avoid tight clothing — anything that puts pressure on your abdomen can push the hernia upward and worsen symptoms.
Track your triggers — personal trigger identification becomes even more important when you have a hernia. GERDBuddy can help you log meals and symptoms to identify patterns specific to your situation.

Dietary Adjustments

The same dietary principles apply, but you may need to be more strict about them:

Avoid common trigger foods — fatty foods, citrus, tomatoes, chocolate, mint
Be careful with coffee and alcohol — these relax the LES, which is already compromised
Focus on foods that help — lean proteins, non-citrus fruits, whole grains, green vegetables

Medications

GERD medications work the same way whether you have a hernia or not:

Antacids for quick relief
H2 blockers for moderate, longer-lasting acid reduction
PPIs for stronger acid suppression when lifestyle changes aren't enough

Your doctor may recommend a longer course of medication if a hiatal hernia is contributing to more persistent symptoms.

When Is Surgery Needed?

Surgery for hiatal hernias is generally reserved for specific situations:

Large paraesophageal hernias that risk strangulation
Severe GERD symptoms that don't respond to medication and lifestyle changes
Complications like esophageal stricture, Barrett's esophagus, or severe esophagitis

The most common procedure is a Nissen fundoplication, where the top of the stomach is wrapped around the lower esophagus to strengthen the LES. The hernia is also repaired at the same time. Most of these are done laparoscopically (minimally invasive) and have good success rates.

But surgery is not a casual decision. Most people with hiatal hernias and GERD can manage their symptoms effectively through lifestyle changes and medication. Surgery is typically only considered after other approaches have been exhausted.

The Practical Takeaway

Having a hiatal hernia doesn't automatically mean your GERD will be severe or unmanageable. Many people with hernias control their symptoms well through the same strategies that work for GERD in general — they just need to be more consistent about applying them.

The most important thing is understanding your personal triggers and patterns. Start tracking what you eat, how you eat, and when symptoms appear. With a hiatal hernia, the margin for error is smaller, so the data becomes even more valuable. GERDBuddy can help you build that picture quickly and clearly.

If your symptoms are worsening despite lifestyle changes, or if you're experiencing any warning signs, talk to your doctor about further evaluation. A hiatal hernia is very manageable — but it does benefit from attention and consistency.

Hiatal Hernia and GERD: Understanding the Connection