Is a hiatus hernia dangerous?

Most — the small sliding type — are not dangerous and may cause no symptoms; the main problem is acid reflux. The uncommon large para-oesophageal type carries a small risk of strangulation, which is a medical emergency.

Can a hiatus hernia be cured without surgery?

The hernia itself is not "cured" by medication, but its symptoms (reflux) are usually well controlled with lifestyle changes and PPIs, so most people never need surgery.

What is the difference between a hiatus hernia and acid reflux?

They are linked but not the same. A hiatus hernia is a structural change at the diaphragm; acid reflux is acid flowing back into the oesophagus. A hiatus hernia can cause or worsen reflux, but you can have either one without the other.

How is a hiatus hernia diagnosed in Singapore?

Usually with a gastroscopy (a thin camera passed into the stomach), sometimes with a barium swallow X-ray. These are widely available through gastroenterology services at public hospitals and private clinics.

When should I see a doctor about a hiatus hernia?

See a doctor for persistent heartburn or reflux, difficulty swallowing, unintended weight loss, vomiting, or signs of bleeding (black stools, vomiting blood). Go to A&E for sudden severe chest or upper-abdominal pain with vomiting.

Hiatus Hernia: Symptoms & Treatment (Singapore)

Written & reviewed by the BestDoctors.sg editorial team · Last updated 1 Sep 2026 · General information, not medical advice

Quick answer. A hiatus (hiatal) hernia is when part of the stomach pushes up through the diaphragm – the muscle separating the chest from the abdomen – into the chest, through the opening where the oesophagus normally passes. Many hiatus hernias are small and cause no symptoms at all. When symptoms do occur they are mostly those of acid reflux – heartburn, regurgitation and chest discomfort. Most are managed simply with lifestyle measures and acid-reducing medication; only large, troublesome or complicated hernias need surgery.

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In a medical emergency, or for severe or sudden symptoms such as breathing difficulty, chest pain, fainting or stroke signs, call 995 immediately.

Hiatus hernia is common and, in its usual form, more of a nuisance than a danger. It matters mainly because of its close link to acid reflux – and because the rarer type carries a small risk that needs watching for.

What it is

The oesophagus (food pipe) carries swallowed food from the throat down to the stomach. On the way it passes through the hiatus, a small opening in the diaphragm – the dome-shaped sheet of muscle that separates the chest from the tummy and does most of the work of breathing. Normally the stomach sits below the diaphragm and the hiatus fits snugly around the lower oesophagus, helping to keep stomach contents where they belong.

A hiatus hernia occurs when the muscle around this opening weakens, or the opening stretches, so that part of the stomach slips up through it into the chest. It is very common, particularly with increasing age, and many people never know they have one. It is closely linked to acid reflux because the natural anti-reflux barrier where the oesophagus meets the stomach is loosened, making it easier for acid to travel back up.

Types

In plain terms, there are two main kinds:

Sliding hiatus hernia – by far the more common type. The junction where the oesophagus meets the stomach slides up through the hiatus into the chest and back down again, often changing position with breathing, swallowing or posture. This type is the one usually associated with reflux symptoms.
Para-oesophageal (“rolling”) hernia – less common. Here the junction stays roughly in place, but part of the stomach bulges up alongside the oesophagus. Most cause few problems, but because a pocket of stomach sits in the chest, this type carries a small risk of becoming twisted or trapped, which is why larger ones are watched more closely.

Symptoms

Many people with a hiatus hernia have no symptoms at all, and small hernias are often found by chance during tests done for another reason. When symptoms do appear, they are usually those of acid reflux, including:

Heartburn – a burning feeling behind the breastbone, often worse after meals, when bending over or when lying down.
An acid or bitter taste at the back of the throat or mouth.
Regurgitation – food or sour liquid coming back up.
A feeling of food sticking or being slow to go down.
Belching, early fullness or bloating.
Sometimes a chronic cough, hoarseness or sore throat from acid irritating the upper airway, and occasionally chest discomfort.

Reflux chest discomfort versus heart-related pain

Acid reflux can cause a burning or pressing feeling in the chest, and this can feel worryingly similar to pain from the heart. This is important: never assume that new or unfamiliar chest pain is “just reflux”. Heart-related chest pain may feel like tightness, heaviness or squeezing, and can spread to the arm, jaw, neck or back, often with breathlessness, sweating, nausea or light-headedness – and it may come on with exertion. Reflux discomfort is more often burning, linked to meals or lying down, and may ease with sitting up or antacids. But the overlap is real and cannot be sorted out reliably at home. If chest pain is severe, new, or comes with any of the heart-warning features above, treat it as an emergency and call 995.

Causes and who is at risk

The exact cause is often not clear, but a hiatus hernia tends to develop when the diaphragm around the hiatus weakens or the abdomen is under repeated pressure. Factors that make one more likely include:

Older age, as the muscle and supporting tissue naturally weaken over time.
Being overweight, which raises pressure inside the abdomen.
Pregnancy, again through raised abdominal pressure.
Chronic coughing, constipation and straining, repeated heavy lifting, or persistent vomiting.
Sometimes a larger-than-usual hiatus is simply present from birth.

Having one or more of these does not mean a hernia will definitely form, and many people with a hiatus hernia have no obvious cause.

How it is diagnosed

Because a hiatus hernia so often causes no symptoms, it is frequently found incidentally – picked up during a test arranged for something else. When reflux or swallowing problems are being investigated, a doctor may arrange:

Gastroscopy (upper endoscopy) – a thin flexible camera passed through the mouth to look directly at the oesophagus and stomach, which also shows any inflammation or other reflux-related changes.
A barium swallow X-ray – drinking a chalky liquid that shows up on X-ray as it passes down, outlining the stomach and any hernia.
Other tests, such as oesophageal pressure (manometry) or acid (pH) studies, or a CT scan for larger para-oesophageal hernias, when more detail is needed.

In Singapore, a GP or polyclinic doctor can make the first assessment and refer to a gastroenterologist for these tests where appropriate.

Complications

Most hiatus hernias never cause serious trouble. When complications do arise, they are usually those of ongoing acid reflux:

Inflammation of the food pipe (oesophagitis) from repeated acid exposure, which can cause pain and, over time, narrowing.
Barrett’s oesophagus – a change in the lining of the lower oesophagus after long-standing reflux, which a doctor may monitor over time. You can read more in our guide on Barrett’s oesophagus.

Rarely, a large para-oesophageal hernia can become trapped (incarcerated) or twisted so that its blood supply is cut off (strangulated). This is a surgical emergency, typically causing sudden severe chest or upper-tummy pain, vomiting and difficulty swallowing, and needs immediate hospital care.

Treatment

Many hiatus hernias need no treatment at all, especially small ones that cause no symptoms. When treatment is needed, it is usually aimed at controlling reflux rather than the hernia itself:

Lifestyle measures – losing weight if overweight, eating smaller and earlier meals, not lying down for a few hours after eating, raising the head of the bed, cutting down on known trigger foods, and stopping smoking and reducing alcohol.
Acid-reducing medicines – a doctor may recommend antacids or alginates for mild symptoms, or acid-suppressing classes of medicine (such as proton pump inhibitors or H2-receptor blockers) for more persistent reflux. Classes and duration should be guided by a doctor.
Surgery – an operation to pull the stomach back into place, tighten the hiatus and reinforce the anti-reflux barrier (often done keyhole/laparoscopically) may be considered for large or troublesome hernias, symptoms not controlled by medication, or a para-oesophageal hernia where repair is advised to reduce the risk of it becoming trapped.

A doctor can assess which approach fits your situation, weighing the size and type of hernia against how much it is affecting you.

Living with it and self-care

For most people, a hiatus hernia is a long-term but very manageable condition. Simple daily habits often keep symptoms in check: eat slowly and in smaller portions, avoid large or fatty meals late at night, stay upright for a while after eating, and keep to a healthy weight. Loose clothing around the waist, treating a chronic cough or constipation, and avoiding foods and drinks that personally trigger reflux can all help. If you need regular medication or notice that symptoms are changing, keep in touch with your doctor rather than simply increasing over-the-counter remedies on your own. HealthHub offers reliable general information on reflux and digestive health for people in Singapore.

When to see a doctor, and red flags

See a doctor if reflux symptoms are frequent, persistent or not settling with simple measures, so the cause can be assessed and treated properly. Seek medical attention promptly if you notice any of these warning signs:

Difficulty or pain when swallowing, or a feeling of food sticking.
Unintentional weight loss.
Vomiting blood, or passing black, tarry stools (a sign of bleeding).
Persistent vomiting.

Seek emergency care (call 995 or go to A&E) for sudden severe chest or upper-tummy pain with vomiting and difficulty swallowing, which can signal a trapped hernia. And, as above, never assume that new chest pain is “just reflux” – heart problems can feel very similar, so unexplained or severe chest pain should be treated as an emergency.

Related digestive & liver conditions

Sources

SingHealth — hiatal hernia (sliding vs para-oesophageal types; symptoms; risks; complications; diagnosis; treatment); SGH — upper GI and bariatric surgery (fundoplication).
NHS inform — hiatus hernia (types; GORD link; gastroscopy diagnosis; lifestyle/medication vs surgery).
MSD Manual / Cleveland Clinic — strangulation risk of the para-oesophageal type; surgical options.

General information only. This guide is general information about a digestive or liver condition and is not a diagnosis or personalised medical advice. See a doctor — a GP or a gastroenterologist — for assessment, tests and treatment. Call 995 for severe abdominal pain with fever, vomiting blood, black tarry stools, or jaundice with fever and abdominal pain.

Hiatus Hernia in Singapore: Symptoms & Treatment