When does a hiatus hernia actually need surgery?

A hiatus hernia is one of the most common things I see — and one of the most over-worried-about. Seeing one on a scan or an endoscopy report doesn’t mean you need surgery; most people who have one never will. So the question I’m really being asked is: how do you know when it’s actually time to fix it? Here’s how I think about it.

Most hiatus hernias don’t need surgery

Let me start with the reassurance, because it’s true for the majority. A small sliding hiatus hernia whose reflux is well controlled with medication and sensible lifestyle measures is usually fine to leave alone and manage medically. A hernia on a report is a finding, not a diagnosis that automatically leads to the operating room. If that describes you, the honest answer is often: we keep an eye on it, we keep your symptoms controlled, and we don’t operate.

When surgery is genuinely worth considering

Surgery comes onto the table when one or more of these is true:

• Reflux that medication no longer controls. If you’re taking proper acid-suppressing medication and still have meaningful reflux — breakthrough heartburn, regurgitation, symptoms waking you at night — that’s one of the clearest reasons to consider a repair.
• You’d rather not be on medication for the rest of your life. Some people control their reflux perfectly well on tablets but don’t want to take them for decades. That’s a completely legitimate reason to discuss surgery — it’s a quality-of-life choice, and it’s yours to make.
• A large or symptomatic paraesophageal hernia. These behave differently from the small sliding kind. When a large part of the stomach sits up in the chest it can cause chest discomfort, trouble swallowing, food getting stuck, or breathlessness after meals — and, rarely, it can twist and become an emergency. A large or symptomatic paraesophageal hernia is a stronger reason to repair, and to do it electively rather than wait for trouble.
• Unexplained anaemia with a known hernia. A hernia can cause slow, hidden blood loss. If you have a known hernia and unexplained iron-deficiency anaemia, that connection is worth taking seriously.
• Testing confirms the problem. I don’t operate on a symptom or a picture alone. Before I recommend surgery, I want testing to confirm the hernia is genuinely the cause — more on that below.

When I watch, wait, or investigate first

Just as important as knowing when to operate is knowing when not to. I hold back, or look deeper first, when:

• It’s a small sliding hernia, well controlled on medication. If it isn’t causing trouble, it usually doesn’t need fixing.
• The symptoms may not actually be from reflux. Chest pain and difficulty swallowing have other causes. If I’m not convinced the hernia is the culprit, operating on it won’t help — so I find out first.
• The esophagus has weak motility. If the swallowing muscle is weak, a standard anti-reflux repair can make swallowing worse. That’s why testing the esophagus matters before committing — it can change what I recommend.
• It’s a symptom-free hernia in a higher-risk patient. If a hernia isn’t causing problems and the patient faces a higher surgical risk, the risk of operating can outweigh the benefit. Watching is sometimes the wiser call.
• There’s significant obesity. Weight has a real effect on both reflux and the durability of a repair. In some patients, addressing weight first — sometimes with a different operation altogether — is the better path, and I’ll say so.

Why I insist on testing first

This is the step patients sometimes want to skip, and I won’t. Before recommending surgery I confirm the picture — typically an endoscopy, and where needed a pH study to prove the reflux and a motility study to check the swallowing muscle. That’s what lets me be sure we’re treating the right problem, and choose the right operation for your anatomy rather than a one-size-fits-all repair.

And when we do operate

When surgery is the right call, I do the repair through keyhole (laparoscopic) surgery. Without getting technical here, the thing I care about most is making the repair last: relieving tension and restoring the length of esophagus below the diaphragm before anything is closed, and using mesh only selectively — a bioabsorbable reinforcement of a sound repair, never a way to rescue one that’s under tension. I’ve written about how I approach the operation itself, and my view on mesh, in more detail in Dr. Irshad’s Take on hiatus hernia.

Dr. Kashif Irshad, MD, MSc, FRCSCThoracic & benign esophageal surgeon. This article is general information, medically reviewed September 2026. About Dr. Irshad →