How to Sleep With Acid Reflux: Why Nights Are Worse and What Helps

It is 1am and the burn is back. You lie down feeling fine, and within minutes there is a sour taste at the back of your throat, a tight heat behind your breastbone and no comfortable position to be found. If you are searching for how to sleep with acid reflux, you are far from alone, and the nights it ruins are usually the ones that follow a late meal, a glass of wine or a pile of extra pillows that did not help.

So what actually works when reflux strikes at night? This guide explains why lying down makes acid reflux worse, how to tell which cause is yours, and the fixes in the order worth trying, from free changes to the one piece of kit that can make them easier to stick to.

How to sleep with acid reflux: what actually works?

None of this is a cure, and reflux that keeps coming back is worth getting checked. But for the everyday kind that flares at night, the combination below helps many people sleep through. First, it helps to know why night-time is so much worse.

Cause 1: Lying flat takes gravity out of the equation

When you are upright, gravity helps keep stomach contents where they belong; when you lie flat, that help disappears. The valve at the bottom of your oesophagus does the main job of keeping acid down, but it can relax or open briefly, and flat on your back there is nothing to stop acid travelling upwards. That is why reflux that barely bothers you at 7pm can feel miserable at midnight, and why a big evening meal followed by a lie down on the sofa so often ends badly.

Cause 2: A full stomach at bedtime

The fuller your stomach is when you lie down, the more pressure there is pushing acid towards that valve. Large meals, fatty or spicy food, chocolate, fizzy drinks, caffeine and alcohol are the usual culprits, because they slow the stomach emptying, relax the valve, or both. Eating late hits hardest, since your stomach is still busy digesting just as you lie down. Our guide to what to eat and avoid for better sleep covers the food side, and how alcohol disrupts your sleep cycle explains why a nightcap is the worst of both worlds.

Cause 3: Which side you lie on

Studies of night-time reflux suggest that lying on your left side keeps acid exposure lower than lying on your right. The thinking is that on the left, the junction between your oesophagus and stomach sits above the main pool of stomach contents, while on the right it can sit below it. The effect is modest rather than dramatic, and it varies from person to person, but it is free and one of the easiest changes to test. Our article on the best sleeping position looks at what the wider evidence says about each way of lying.

Cause 4: Sleep slows the clean-up

Awake, you swallow often and produce plenty of saliva, both of which wash acid back down; asleep, you do far less of both. That means any acid that does reach your oesophagus stays there longer and irritates more. It also explains why reflux can wake you, leave you with a dry cough or a sore throat in the morning, or show up as a nagging wake-up around the same time each night. If a night-time cough is your main symptom, see our guide to sleeping with a cough.

Is this you?

What to do about it

The fix follows the cause, so start with the free changes. Give each one a week or two before judging it.

Step 1: Move your last meal earlier (Cause 2)

Aim to finish eating at least three to four hours before bed, and keep the evening meal on the smaller side. If you need a snack later, keep it small and plain. For two weeks, jot down what you ate and drank on the nights reflux hit; most people find one or two repeat offenders, such as a late curry, red wine or an evening coffee. You rarely need to cut out everything, just the real culprits.

Step 2: Raise the head of the bed (Causes 1 and 4)

The aim is to tilt your whole upper body, not just bend your neck. Sturdy blocks of 10 to 20cm under the head-end legs of the bed work well, as does a firm wedge that lifts you from the waist up. Gravity then does some of the work that your valve and your swallowing normally would. It can take a few nights to get used to the slope.

Step 3: Sleep on your left side (Cause 3)

Settle on your left side when you go to bed. Staying there all night is the hard part, because side sleeping can strain the hips and lower back, so you drift onto your back or right side without noticing. A pillow between the knees keeps your hips level and makes the position far more comfortable, so you are more likely to stay put. The DreamPad Knee Pillow is a contoured memory foam pillow made for exactly that. The honest caveat: it will not treat reflux or raise your head, it simply makes left-side sleeping easier to keep up. Our best knee pillow UK guide compares the options, the sleep posture collection has everything in one place, and if side sleeping makes your hips ache, read hip pain when sleeping on your side.

Step 4: Loosen up and tidy the evening (Causes 2 and 4)

Avoid tight waistbands or shapewear in the evening, and do not lie down straight after eating. If you smoke, stopping is one of the most effective things you can do for reflux, and if you carry extra weight around your middle, even modest, gradual loss can ease the pressure on your stomach. These are slower changes, but they tend to make the first three steps work better.

"Just prop yourself up on a few extra pillows" - is that the same thing?

Not quite. Extra pillows lift your head and shoulders, but they tend to fold you at the waist, which can squeeze your stomach and actually push acid upwards. What helps is a gentle slope that runs from your hips to your head, so your whole upper body is angled and your stomach is not kinked. That is why raised bed legs or a full-length wedge beat a stack of regular pillows. Pillows are not useless, though: a firm wedge designed to lift your torso is a different thing from three soft pillows, and if you cannot raise the bed, it is the next best option. The point is the angle of your body, not how many pillows you own.

When it's different for you

• If you are pregnant: reflux is very common, especially in later pregnancy. The steps above are gentle, but talk to your midwife or GP before taking any heartburn remedy. Our guide to sleep during pregnancy has more on comfortable positions.
• If you have a diagnosed condition such as GORD or a hiatus hernia: follow your clinician's plan first. These changes are additions to it, not replacements, and our knee pillow is a comfort aid, not a reflux treatment.
• If you take regular medication: some medicines can irritate the gullet or relax the valve. Ask your pharmacist or GP, and never stop a prescribed medicine on your own.
• If this is about a baby or child: reflux in infants is different and needs advice from your health visitor or GP. This article is written for adults.

When to see your GP

Frequently asked questions

Which side should you sleep on with acid reflux?

Your left side is the better choice for most people, because studies suggest it keeps acid exposure lower than your right. A pillow between the knees such as the DreamPad Knee Pillow helps you stay there comfortably, and our best sleeping position article covers the other positions.

Can you sleep on your back with acid reflux?

You can, but lying flat on your back is usually the least helpful position for reflux, because nothing is working against gravity. If you prefer your back, raise the head of the bed or use a full-length wedge so your upper body is angled, rather than lying flat or propped on a stack of soft pillows.

Is it bad to lie down after eating?

Lying down soon after a meal makes reflux more likely, because your stomach is full and gravity is no longer helping. Try to stay upright for a few hours after eating, and take a gentle stroll if you can. Our piece on walking and sleep explains why an easy evening walk is a good habit anyway.

Why is my acid reflux worse at night?

Because lying flat removes gravity's help, you swallow less while asleep, and your last meal or drink is often still in your stomach. Put together, acid stays in your oesophagus longer and irritates more. If you keep waking at the same hour, our guide on why you wake up at 3am may also help.

Does alcohol make acid reflux worse at night?

For many people, yes. Alcohol can relax the valve at the bottom of your oesophagus and increase stomach acid, and it also fragments your sleep as it wears off. If you notice reflux on nights you drink, try finishing your last drink several hours before bed, or skip it on the nights you most want to sleep well.

The bottom line

Move your last meal earlier, raise the head of your bed, and train yourself to sleep on your left side. Trim the triggers that you can actually prove are yours, and loosen up in the evening. If three weeks of this changes nothing, or any of the red flags above apply, see your GP rather than putting up with it.

Night-time reflux is miserable, but it is rarely mysterious. Most people find that two or three of these steps take the edge off within a couple of weeks, and that is often enough to turn broken nights into ordinary ones. Be patient with yourself, change one thing at a time, and expect progress rather than perfection.

Try the DreamPad Knee Pillow - a contoured pillow that keeps your hips level so left-side sleeping is easier to keep up all night.

This article is general information, not medical advice. If your symptoms are persistent or severe, or you are unsure what is causing them, please speak to your GP. SleepyDeepy products are designed to support your sleep and are not a treatment for any medical condition.

Settle in. Drift off. SleepyDeepy.