Heartburn at Night: Why It Happens and What Helps
- Lying flat, a late or large dinner and a slow-clearing stomach are the main reasons night symptoms are worse.
- NHS and NIDDK advice: finish eating at least 3 to 4 hours before bed.
- Raise the head of the bed with blocks or a wedge, not a stack of pillows that bends your waist.
- Some common medicines, including certain blood-pressure drugs and NSAIDs, are listed by NIDDK as GERD risk factors; ask a pharmacist, do not stop them yourself.
- Waking up choking, coughing, hoarse or short of breath, or night heartburn on most nights, needs medical review.
Why heartburn is worse at night
When you stand or sit, gravity helps keep stomach contents in the stomach. When you lie flat, that help is gone, and any acid that escapes can travel further up the esophagus. During sleep you also swallow less often, and swallowing normally helps wash acid back down, so acid can stay in contact with the lining for longer. Together, these effects mean the same amount of reflux can cause more discomfort, or more damage, at night than during the day.
Night symptoms often show up as a burning feeling behind the breastbone, a sour or bitter taste, waking with a cough or hoarse throat, or a feeling that something is stuck. They can also be mild enough that you simply sleep badly without making the connection. If your night symptoms are mostly throat-related, our guide to silent reflux (LPR) may fit.
Dinner timing and size
This is the single most consistent piece of advice from public health sources. The NHS says do not eat within 3 or 4 hours before bed, and NIDDK says eating meals at least 3 hours before you lie down may improve symptoms. In practice that means that if you go to bed at 11 pm, your last substantial meal should be finished by about 7 or 8 pm.
- Make dinner the smaller meal if you can, and avoid very large portions. The NHS also recommends smaller, more frequent meals.
- Watch the late snack. A bowl of cereal or a few biscuits at 10 pm counts as eating before bed.
- Think about triggers at dinner. NIDDK lists acidic foods (such as citrus and tomatoes), alcohol, chocolate, coffee and other caffeine, high-fat foods, mint and spicy foods as commonly linked to GERD symptoms. Your own list may be shorter or longer; see foods that trigger acid reflux.
- Alcohol near bedtime is a common culprit; see alcohol and acid reflux.
Head-of-bed elevation, left side and pillows
The NHS suggests raising the head of the bed by around 10 to 20 cm (4 to 8 inches) using blocks, bricks or books under the bedposts, and advises against relying on extra pillows because they can increase pressure on your belly. A wedge designed for this purpose is another option; see our buying guides for wedge pillows and bed risers, which include Amazon affiliate links and a clear disclosure.
Sleeping position also matters for some people, and many find lying on the left side more comfortable than the right. Studies on this are small, and individual responses vary, so treat it as something to test. Our sleeping position guide covers the details. Check that any raised surface is stable and does not leave a gap that could trap a limb, especially for older adults or anyone with mobility problems.
Drinks and habits close to bedtime
- Large drinks before bed add volume to the stomach. Sip, and finish liquids earlier in the evening.
- Coffee and other caffeine late in the day are on the NIDDK list. See coffee and acid reflux.
- Tight waistbands and pajamas can add pressure; the NHS advises against clothes that are tight around the waist.
- Smoking is a risk factor for GERD, and quitting is among the most useful steps; see smoking and acid reflux.
- Weight. Carrying extra weight around the middle is a listed risk factor. Even modest changes can help some people; see weight loss and acid reflux.
Medicines that can matter at night
NIDDK lists several types of medicine among the risk factors for GERD: benzodiazepines, calcium channel blockers, certain asthma medicines, NSAIDs and tricyclic antidepressants. If you take one of these and your night heartburn started or worsened around the same time, mention it to your clinician or pharmacist. Do not stop any of them on your own: the NHS says not to stop prescribed medicine without speaking to a doctor first.
For occasional heartburn, the NHS says a pharmacist may recommend an antacid or alginate, which work best with food or soon after eating and should not be taken regularly for long periods. If you need relief most days, a doctor may talk through other options; see antacids vs H2 blockers vs PPIs and best antacids for acid reflux. We give no dosing advice.
What a self-help program might add
We read the member copy of The Acid Reflux Strategy that the publisher gave us free for review. We did not buy it and have not followed it. We mention it only to say what it claims and to check that claim against public medical sources. Its advice on evening habits is ordinary: smaller dinners, avoiding the foods on your personal trigger list and keeping a food diary. That matches public guidance, which is a point in its favor, but you can follow that advice without buying anything. If you are curious how the program compares overall, see our review.
A simple one-week night-time plan
- Night 1 to 3: move your last meal to at least 3 hours before bed and keep it modest. Note how you sleep.
- Night 4 to 5: raise the head of the bed using a safe, stable method. Keep the first change going so you can tell what helps.
- Night 6 to 7: look at drinks and snacks in the last two hours before bed.
- After a week: if you still wake with heartburn on several nights, book a visit and take your notes.
Questions to ask your doctor or pharmacist
- How often is night-time heartburn too often to manage myself?
- Do any of my regular medicines contribute to reflux?
- Could a hiatal hernia, sleep apnea or another condition be involved in my night symptoms?
- Is it safe to use an antacid or alginate regularly, and for how long?
- Should I be tested or have an endoscopy?
FAQ
Why does heartburn get worse when I lie down?
Lying flat removes gravity’s help, and swallowing and saliva slow during sleep, so acid can reach higher and stay longer.
How long before bed should I stop eating?
The NHS says not to eat within 3 or 4 hours before bed, and NIDDK says at least 3 hours may improve symptoms.
Do extra pillows help night heartburn?
The NHS advises against relying on extra pillows because they can add pressure on the belly. It suggests raising the head of the bed by about 10 to 20 cm with blocks or books.
Which side should I sleep on?
Many people find the left side more comfortable, but evidence is limited and responses vary. Test it and keep a note.
When is night-time heartburn a medical concern?
If it happens most nights, wakes you choking or coughing, or comes with trouble swallowing, weight loss, vomiting, black stools or chest pain, see a doctor.
Sources
- NHS: Heartburn and acid reflux
- NIDDK: Eating, diet and nutrition for GER and GERD
- NIDDK: Symptoms and causes of GER and GERD
- ACG Clinical Guideline for the Diagnosis and Management of GERD (Katz et al., Am J Gastroenterol 2022)
Medical disclaimer: this article is general information for adults, not medical advice, diagnosis or treatment, and it was not written by a doctor. It does not replace your own clinician. Last reviewed 20 Oct 2026. Some pages we link to contain affiliate links; we may earn a commission at no extra cost to you. See our affiliate disclosure, medical disclaimer and editorial policy.
