Heartburn at Night: Why It Happens and How to Sleep Without It
Share
Heartburn at night is that burning feeling behind your breastbone that seems to arrive the moment you lie down. It's usually reflux: stomach acid rising into your oesophagus, helped along by gravity no longer working in your favour. This guide covers why heartburn gets worse at night, the common triggers, how to set up your evening and your bed to reduce it, and when it's time to see your GP.
The short answer: heartburn at night happens when stomach acid flows back up into your oesophagus, and lying flat after a meal makes that easier. Leave about three hours between eating and lying down, keep evening meals smaller, cut back on common triggers like alcohol, fatty or spicy food and caffeine, and raise the head of your bed. Sleeping on your left side may also help. See your GP if it happens twice a week or more, or straight away if you have trouble swallowing, vomiting blood or severe chest pain.
This guide is general information, not medical advice.
Why heartburn is worse at night
Healthdirect explains that heartburn happens when acid from your stomach rises up into your oesophagus (source). During the day, you're mostly upright, and gravity helps keep stomach contents where they belong. You also swallow more often when you're awake, which helps clear acid.
At night, three things stack up:
- You're lying flat, so acid can travel up more easily.
- Dinner is often the biggest meal, and it's eaten closest to bedtime.
- Evening habits, such as a drink, dessert or a late snack in front of the TV, add more triggers.
That's why the same meal that's fine at lunch can keep you awake at 11pm.
Common triggers
Healthdirect lists these as common triggers for heartburn (source):
| Trigger | Why it matters at night |
|---|---|
| Fatty or spicy food | Often part of a large evening meal or takeaway |
| Alcohol | Commonly drunk in the evening |
| Caffeine and chocolate | Coffee after dinner, dessert |
| Fizzy drinks | Can add to pressure in the stomach |
| Smoking | A known trigger at any time |
| Being overweight or pregnant | More pressure on the stomach |
| Exercise soon after eating | Can push acid upwards |
Triggers vary between people. A short food and symptom diary over a week or two can show which ones matter for you.
Your evening plan
Small changes to timing usually help more than any single food swap.
- Leave about three hours between eating and lying down. Healthdirect recommends this gap (source). If you go to bed at 10.30pm, aim to finish dinner by 7.30pm.
- Eat smaller meals more often, rather than one large dinner.
- Go easy on your own triggers in the evening, especially alcohol and rich takeaway.
- Wear loose clothes after dinner rather than anything tight around the waist.
- Skip vigorous exercise straight after eating. A gentle walk is a different matter.
If your schedule makes an early dinner hard, such as late shifts, see eating before bed for how to handle late meals. Alcohol is worth a closer look too; see does alcohol help you sleep.
Setting up your bed
Raise the head of the bed. Healthdirect suggests elevating the head of your bed so you're raised from the waist up (source). This is different from stacking pillows, which can bend you at the neck and waist rather than lifting your whole upper body. Options include:
- Blocks or risers under the legs at the head end of the bed
- A wedge that runs from your waist to your shoulders
Try your left side. A 2023 systematic review pooled three small studies on sleeping position and reflux. Lying on your left side was linked with less acid exposure and faster acid clearance than lying on your right, and one trial found that positional therapy encouraging left-side sleep improved night-time symptoms and increased reflux-free nights. The authors noted the evidence is limited and the studies were small (source). It costs nothing to try, but staying on one side all night is hard. For more on positions generally, see the best sleeping position.
Medicines
Antacids from the pharmacy neutralise stomach acid and can help with occasional heartburn. Healthdirect notes that proton pump inhibitors (PPIs) work best taken 30 to 60 minutes before a meal, and shouldn't be used for longer than 8 weeks without talking to your doctor (source). Your pharmacist can help you choose, and can tell you whether something you already take might be making reflux worse.
When to see your GP
See your GP if you have heartburn twice a week or more, or if it keeps waking you. Healthdirect also advises seeing a doctor if heartburn comes with weight loss, difficulty swallowing, or vomiting, especially if there's blood in it.
Call triple zero (000) for severe chest pain. Heart problems can feel like heartburn, so don't assume chest pain is reflux.
Reflux can also be one of several reasons for broken sleep, alongside things like waking up to pee at night. If you're waking a lot and don't know why, mention it all to your GP.
Where the Sovune Nudge fits
We make the Sovune Nudge, a vibrating alarm wristband, so we're not neutral. It won't do anything for reflux. It's simply a quiet way to wake up, which can be useful if you've changed how you sleep, such as on a wedge or a raised bed.
- Silent. It wakes you with vibration on your wrist, so there's no alarm sound for a partner.
- Builds gradually, starting as a gentle tap and rising through three intensity levels.
- Each alarm runs for a full minute, getting stronger as it goes, and you can switch it off sooner.
- No phone on the bedside table. Set it on the band itself, with no app or Bluetooth.
It comes with a 30-day money-back guarantee.
Quick answers
Why do I get heartburn as soon as I lie down? Lying flat makes it easier for stomach acid to rise into your oesophagus, especially soon after a meal.
How long should I wait after eating before bed? Healthdirect recommends about three hours between eating and lying down.
Is sleeping on my left side better for reflux? Small studies suggest left-side sleeping is linked with less acid exposure than the right side. The evidence is limited, but it's easy to try.
Do extra pillows help with heartburn? Raising the whole head of the bed, from the waist up, is the usual advice. Extra pillows can bend you at the waist instead.
For every type of silent alarm compared, see our complete guide to vibrating alarms in Australia.