Acid reflux (GORD)

When you swallow food or drink, it travels down the oesophagus to your stomach. This is where acid reflux can occur. A muscle named the ‘lower oesophageal sphincter’ opens to let the food or drink into your stomach. This muscle should ‘close’ immediately after the food or drink passes through. However, if it doesn’t work perfectly, your stomach acid can reflux back into the oesophagus. Acid reflux can occur without you knowing but often produces a burning sensation (heartburn). This is the main symptom of acid reflux.

Acid Reflux (GORD): Why It Happens — and How Better Sleep Can Help

If you’ve ever gone to bed feeling fine and then found yourself awake with a burning chest, sour taste, or nagging cough, you’re not alone. Acid reflux is incredibly common, and for many people it gets noticeably worse at night. When reflux becomes frequent or ongoing, it may be diagnosed as GORD — gastro-oesophageal reflux disease.

The good news is that while reflux can be frustrating, there are practical ways to reduce symptoms — and your sleep setup can make a real difference.

What is acid reflux?

Acid reflux happens when stomach acid flows back up into the oesophagus (the tube that carries food from your mouth to your stomach). Normally, a ring of muscle at the bottom of the oesophagus — called the lower oesophageal sphincter (LOS) — acts like a valve, keeping stomach contents where they belong.

When that valve weakens or relaxes at the wrong time, acid can move upwards and irritate the lining of the oesophagus.

Occasional reflux after a heavy meal is common. But if it happens regularly, causes discomfort, or disrupts daily life and sleep, it may be a sign of GORD.

Common symptoms of GORD

Symptoms can vary from person to person, but some of the most common include:

• Heartburn — a burning feeling in the chest or throat
• A sour or bitter taste in the mouth
• Regurgitation — feeling food or liquid come back up
• Bloating or burping
• Nausea after meals
• A chronic cough, especially at night
• Hoarseness or throat irritation
• Difficulty sleeping due to discomfort

Some people don’t experience classic heartburn at all and instead notice a persistent cough, throat clearing, or a “lump in the throat” feeling.

Why acid reflux often gets worse at night

Many people notice that reflux is far more troublesome once they get into bed — and there are a few simple reasons for that.

1. Lying flat makes it easier for acid to travel upwards

When you’re standing or sitting upright, gravity helps keep stomach acid down. But when you lie flat, that natural advantage disappears. Acid can more easily move back into the oesophagus, especially after an evening meal or snack.

2. Digestion can slow down overnight

Your digestive system naturally slows while you sleep, which means food may stay in the stomach for longer. That can increase pressure in the stomach and raise the likelihood of reflux.

3. Less swallowing means less natural clearing

During the day, we swallow more often, which helps wash acid back down into the stomach. At night, swallowing decreases, so acid may remain in the oesophagus for longer and cause more irritation.

4. Sleep disruption can become a cycle

Reflux can wake you up, and poor sleep can increase stress and sensitivity — which may make symptoms feel even worse. Over time, this can turn into a frustrating loop of bad sleep and nighttime discomfort.

What can trigger reflux?

There isn’t one single cause of GORD. Often, it’s a combination of lifestyle, digestion, and anatomy. Common triggers include:

• Large meals, especially late in the evening
• Fatty, rich, or spicy foods
• Chocolate, peppermint, and caffeine
• Alcohol
• Smoking
• Stress
• Pregnancy
• Being overweight
• Certain medications

Triggers are highly individual, so it can help to keep a simple symptom diary to spot patterns.

How to sleep better with acid reflux

If reflux is disturbing your sleep, one of the most effective things you can do is change your sleeping position and posture.

Elevate your upper body

Raising your head and chest can help use gravity to your advantage and reduce the chance of acid travelling upwards during the night.

This is where supportive sleep positioning becomes especially important. A properly designed wedge pillow or elevated support pillow can help keep the upper body at a gentle incline, rather than leaving you flat on the mattress.

That slight elevation may help reduce:

• Night-time heartburn
• Regurgitation
• Throat irritation
• Sleep disruption caused by reflux

Unlike stacking several ordinary pillows — which can put your neck out of alignment — a structured incline offers more stable support for both comfort and posture.

Try sleeping on your left side

If you’re a side sleeper, the left side is often considered the better option for reflux sufferers. This position may help keep stomach contents lower than the oesophagus, making reflux less likely.

Sleeping on your back completely flat, or on your right side, may worsen symptoms for some people.

Avoid eating too close to bedtime

Try to leave at least 2–3 hours between your evening meal and going to sleep. That gives your stomach more time to empty and can reduce the likelihood of acid moving upwards once you lie down.

Choose sleep comfort that supports your whole body

If reflux causes you to prop yourself up awkwardly or shift around all night, you may also end up with neck, shoulder, or back discomfort. The right pillow support can help you stay in a more comfortable, elevated position for longer — so you’re less likely to wake up repeatedly.

Everyday habits that may help reduce symptoms

Alongside improving your sleep setup, a few simple lifestyle changes may also make a difference:

• Eat smaller meals rather than very large ones
• Limit foods that you know trigger symptoms
• Reduce caffeine and alcohol, especially in the evening
• Maintain a healthy weight if advised to do so
• Avoid tight clothing around the waist after meals
• Stop smoking if you smoke

These changes won’t cure GORD overnight, but they can help reduce the frequency and intensity of flare-ups.

When should you speak to a doctor?

Occasional reflux is common. But if you’re experiencing symptoms more than twice a week, or if reflux is regularly affecting your sleep or quality of life, it’s worth speaking to a GP or healthcare professional.

You should also seek medical advice if you have:

• Difficulty swallowing
• Unexplained weight loss
• Ongoing vomiting
• Chest pain
• Black stools or signs of bleeding

Persistent reflux shouldn’t be ignored, especially if it’s becoming a long-term issue.

The bottom line

Acid reflux and GORD can have a major impact on comfort, rest, and overall wellbeing — especially when symptoms flare up at night. But while reflux can feel difficult to manage, small changes often go a long way.

Eating a little earlier, avoiding known triggers, and most importantly sleeping in a more supportive, elevated position can all help reduce discomfort and improve your chances of a better night’s sleep.

When it comes to reflux, how you sleep matters — and the right support could be one of the simplest ways to feel more comfortable at bedtime.