Wedge Pillow for Acid Reflux: How High to Go, Which Side to Sleep On, and Wedge vs Bed Risers
A wedge pillow can help night-time acid reflux if it raises your whole torso, not just your head. The American College of Gastroenterology suggests raising the head of the bed for people with night-time reflux symptoms, and small trials found that it cut the time stomach acid spent in the oesophagus overnight.13 The US National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) says to raise your head 6 to 8 inches (15 to 20 cm) off the bed.2 Sleeping on your left side also helps; the right side tends to make reflux worse.14 Pair either with an earlier dinner. A wedge eases symptoms; it does not treat GERD. See a doctor if heartburn is frequent or comes with warning signs.
Heartburn that wakes you up, or a sour taste when you lie down, is one of the most common reasons people buy a wedge pillow. It is also one of the few pillow claims with real clinical evidence behind it, as long as the wedge is set up properly. This guide covers why reflux gets worse at night, how high to go, whether a wedge or bed risers work better, the best sleeping position, and how to sleep on a wedge without sliding off it by 3am.
Why reflux is worse when you lie down
Acid reflux happens when stomach contents flow back up into the oesophagus (the food pipe). The discomfort that causes is heartburn. GERD (gastro-oesophageal reflux disease) is the longer-lasting, more frequent form.6
Two things stack up at night. Reflux tends to be at its worst after a meal, and many of us lie down soon after dinner, a late snack or a nightcap. And once you are flat, acid no longer has to fight gravity to reach your throat.6 Lying on your right side makes it worse again: the American College of Gastroenterology (ACG) notes that right-side-down lying increases reflux at night and after meals, probably because it leaves the valve between stomach and oesophagus sitting low relative to the pool of stomach contents.1
Put together, that explains the classic pattern: fine during the day, burning or coughing an hour after you go to bed.
Does a wedge pillow help acid reflux?
For night-time symptoms, reasonably good evidence says yes, with some caveats. Here is what the more reliable sources say:
- The ACG 2022 guideline suggests elevating the head of the bed for night-time GERD symptoms. It notes that several studies, including randomised trials, found improvements in night-time symptoms and acid exposure with head-of-bed elevation or sleeping on a wedge. It rates the recommendation as conditional, based on low-quality evidence.1
- A 2012 trial of 20 people with confirmed night-time reflux raised the head of the bed on 20 cm blocks for a week. Time with acid in the oesophagus while lying down fell, acid cleared faster, long reflux episodes dropped from an average of 3.3 to 1.0 a night, heartburn scores improved, and sleep disturbance improved in 13 of the 20.3
- A Stanford review of lifestyle measures concluded that head-of-bed elevation and weight loss were the lifestyle changes with supporting evidence, and that head-of-bed elevation and left-side lying both reduced the time the oesophagus spent exposed to acid.5
The studies are small and mostly short. They measured bed elevation more often than branded wedge pillows. Elevation helps people whose reflux happens lying down; if your heartburn is mainly after daytime meals, a wedge will do little. And no pillow heals an inflamed oesophagus or replaces treatment your doctor prescribes. Think of a wedge as one tool alongside meal timing, weight and medicine, not a cure.
How high a wedge should be for reflux
The aim is to have your oesophagus sloping downhill into your stomach. That means lifting from the waist or hips up. Extra pillows under just your head mostly bend your neck forward; NIDDK's advice is to put a foam wedge, or pillows, under your head and upper back so your body is inclined.2 Stacked pillows also tend to flatten and slide apart during the night, which is why a single wedge is easier.
| Source | Height or angle | Notes |
|---|---|---|
| NIDDK (US National Institutes of Health) | 6 to 8 in (15 to 20 cm) | Head raised off the bed, with the body inclined2 |
| 2012 bed-elevation trial | 20 cm (about 8 in) blocks | Under the head end of the bed, so the whole mattress slopes3 |
| Cleveland Clinic gastroenterologist | 6 to 12 in; wedges often 30 to 45° | Describes the typical range of reflux wedges on the market6 |
Our suggestion: start at around 15 to 20 cm (6 to 8 in). That matches the NIDDK advice and is comfortable for most people to sleep on all night. Go higher only if symptoms continue and you can still sleep well; steeper wedges suit sitting up more than sleeping. Remember that a pillow on top adds height at the head end. If you are not sure what suits you, an adjustable wedge saves guessing. Our wedge pillow guide covers angles, widths and shapes in more detail.
Wedge pillow vs bed risers vs adjustable base
There are three common ways to sleep raised. The research trials mostly raised the bed itself; a wedge that lifts the torso is the other option the ACG mentions.1
| Wedge pillow | Bed risers or blocks (head end only) | Adjustable bed base | |
|---|---|---|---|
| How it works | Foam incline on your side of the bed lifts your torso | Blocks under the head-end legs tilt the whole bed | Motorised base raises the head section |
| Partner | Only you are raised | Both sleepers are tilted | Split bases can raise one side |
| Body shape | Bends at the hips; some sliding | Straight, gentle slope from head to toe | Bends at the hips |
| Changing position | Easy on your back; side sleeping works on lower wedges | Any position, since the whole mattress slopes | Easy |
| Travel | Foldable and inflatable versions exist | No | No |
| Cost | Low to moderate | Low | High |
| Watch out for | Sliding down; choose a long enough slope | Stability. Use sturdy blocks made for the purpose, on both head-end legs, and check the bed does not rock | Price and fit with your mattress |
If you share a bed with someone who does not want to be tilted, or you move a lot at night, a wedge is usually the simpler option. If you sleep in lots of different positions, or wedges make your back or hips sore, risers under the head end give an even slope instead.
Best sleeping position for acid reflux
Left side, then back, then right side. A 2022 study measured sleep position and oesophageal acid together overnight in 57 patients. Acid exposure was lowest lying on the left side, and acid cleared about twice as fast on the left as on the back and faster still than on the right.4 The ACG guideline suggests people might avoid sleeping right side down, and the Stanford review also found left-side lying reduced acid exposure.15
| Position | For reflux | Tips |
|---|---|---|
| Left side | Best | Works flat or on a gentle wedge. A body pillow or knee pillow helps you stay put. |
| Back, raised on a wedge | Good | The classic wedge position. A pillow under the knees stops sliding. |
| Back, flat | Worse than the left side | Acid clears more slowly than on the left side.4 |
| Right side | Worst of the side positions | Linked with more reflux at night and after meals.1 |
| Stomach | Not compatible with a wedge | A Cleveland Clinic gastroenterologist says reflux wedges won't work for stomach sleepers.6 |
Staying on your left side is the hard part, because most people turn over in their sleep. Three things help: a firm positioning wedge behind your back to stop you rolling over, a body pillow to hug so your top arm and leg have somewhere to rest, and a knee pillow so your hips stay comfortable. Our knee pillow guide explains sizing.
How to sleep on a wedge pillow
- Put the wedge against the headboard with the tall end at the top and the thin end pointing down the bed.6
- Lie so the thin edge meets you between your hips and mid-back. Your head and shoulders should be fully supported on the slope. If your head hangs off the top or your arms slide off the sides, the wedge is too short or narrow for you.6
- Add a pillow under your knees if you sleep on your back. Back sleepers often find a wedge more comfortable with support under the knees, and it helps stop you sliding down.6
- Side sleepers: use a lower incline and a normal pillow on top of the wedge to fill the gap between your ear and shoulder. Account for that pillow's height when you choose how high to go.6 Our side-sleeper pillow height guide helps with the top pillow.
- Start at the lowest comfortable setting and raise it over a few nights if reflux continues.
- Give it a week or two. Sleeping on an incline takes getting used to, and it can take time to settle on the setup that works for you.6
Evening habits that help as much as the pillow
The ACG guideline puts some of these on the same footing as elevating the bed, and weight loss above it:1
- Finish eating 2 to 3 hours before bed. The guideline suggests avoiding meals within 2 to 3 hours of bedtime. A lighter, earlier dinner gives your stomach time to empty before you lie down.
- Lose weight if you are carrying extra. This is the guideline's strongest lifestyle recommendation for GERD symptoms.
- Avoid tobacco, and cut back on foods and drinks that you notice trigger your own symptoms. Common triggers vary a lot from person to person.
- Take reflux medicine the way it was prescribed. Timing matters for some medicines; ask your pharmacist or doctor.
- Stay upright after dinner. If you like to read or watch TV in bed in the evening, sit up against a backrest rather than lying back flat.
Night-time reflux is one of several things that can break up sleep. If you keep waking in the small hours, our guide to why you wake up at 3am covers the other common causes.
When to see a doctor
See a doctor if you think you have GERD, or if symptoms don't improve with over-the-counter medicines or lifestyle changes. NIDDK also advises seeing a doctor for any of the following, which can point to complications or other serious problems:7
- chest pain
- problems swallowing, or pain when you swallow
- persistent vomiting or loss of appetite
- vomit that contains blood or looks like coffee grounds, or black, tarry stools
- unexplained weight loss
Heartburn and heart problems can feel similar. Sudden, severe or crushing chest pain, especially with breathlessness, sweating or pain spreading to the arm, jaw or back, needs emergency help. Do not wait to see if a wedge pillow fixes it.
Babies with reflux: no wedges
Wedges and inclined sleepers are not safe for babies. The American Academy of Pediatrics says even babies with GERD should sleep flat on their backs, on a firm, flat surface, and that any surface inclined more than 10 degrees is not safe for infant sleep.8 Talk to your paediatrician about a baby's reflux instead. Everything in this guide is for adults.
What we stock
These are the pieces in our range that fit the setups above. All were listed as available when we checked on 26 September 2026. Measurements come from our own listings; we have not lab-tested them, and we describe what each one is rather than promising what it will do for your reflux.
See the full wedge and elevation collection. For delivery times, see each listing and our shipping policy. If you want help choosing a height or size, contact us.
Frequently asked questions
Does a wedge pillow help acid reflux?
It can help night-time reflux. Raising the head of the bed or sleeping on a wedge has been shown to reduce night-time acid exposure and symptoms in small studies, and the American College of Gastroenterology suggests it for people with night-time symptoms. It works best alongside an earlier dinner and does not replace medical treatment.
How high should a wedge pillow be for acid reflux?
NIDDK advises raising your head 6 to 8 inches (15 to 20 cm) off the bed, with your upper body inclined, not just your head. Many reflux wedges go up to about 12 inches. Start around 6 to 8 inches and go higher only if you still have symptoms and can sleep comfortably.
Is it better to sleep on your left or right side with acid reflux?
The left. Studies that measured acid in the oesophagus overnight found less acid exposure and faster clearance on the left side, and more reflux lying on the right side.
Are bed risers better than a wedge pillow for acid reflux?
Both raise your upper body. Risers under the head end of the bed tilt the whole mattress, so you do not bend at the hips and can sleep in any position, but your partner is tilted too. A wedge raises only you and can travel, but you may slide down it. Much of the research used raised beds, and the ACG guideline mentions both approaches.
Can I just use extra pillows instead?
Pillows under your head alone mostly bend your neck without raising your oesophagus. If you use pillows, they need to lift your head and upper back together, and stacks tend to flatten and shift overnight. A wedge holds the angle more reliably.
How do I stop sliding down a wedge pillow?
Line the thin edge up between your hips and mid-back, put a pillow under your knees, and use the lowest incline that controls your symptoms. Steeper wedges cause more sliding.
Can I sleep on my side on a wedge pillow?
Yes, on a lower incline, with a regular pillow on top of the wedge for head height. Sleeping on your left side on a gentle wedge combines both approaches.
Can I use a wedge pillow for a baby with reflux?
No. The American Academy of Pediatrics says babies, including those with GERD, should sleep flat on their backs on a firm, flat surface. Inclines of more than 10 degrees are not safe for infant sleep.
Keep reading
- Shop wedge pillows
- Wedge pillow angles and heights
- Knee pillow guide
- Side-sleeper pillow height
- 10-minute wind-down routine
Sources
- Katz PO, Dunbar KB, Schnoll-Sussman FH, Greer KB, Yadlapati R, Spechler SJ. "ACG Clinical Guideline for the Diagnosis and Management of Gastroesophageal Reflux Disease." American Journal of Gastroenterology, 2022; 117(1): 27–56. pmc.ncbi.nlm.nih.gov/articles/PMC8754510
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), "Treatment for GER & GERD" (last reviewed July 2020). niddk.nih.gov/health-information/digestive-diseases/acid-reflux-ger-gerd-adults/treatment
- Khan BA, Sodhi JS, Zargar SA, et al. "Effect of bed head elevation during sleep in symptomatic patients of nocturnal gastroesophageal reflux." Journal of Gastroenterology and Hepatology, 2012; 27(6): 1078–1082. pubmed.ncbi.nlm.nih.gov/22098332
- Schuitenmaker JM, van Dijk M, Oude Nijhuis RAB, Smout AJPM, Bredenoord AJ. "Associations Between Sleep Position and Nocturnal Gastroesophageal Reflux: A Study Using Concurrent Monitoring of Sleep Position and Esophageal pH and Impedance." American Journal of Gastroenterology, 2022; 117(2): 346–351. pubmed.ncbi.nlm.nih.gov/34928874
- Kaltenbach T, Crockett S, Gerson LB. "Are lifestyle measures effective in patients with gastroesophageal reflux disease? An evidence-based approach." Archives of Internal Medicine, 2006; 166(9): 965–971. pubmed.ncbi.nlm.nih.gov/16682569
- Cleveland Clinic Health Essentials, with gastroenterologist Scott Gabbard, MD, "Will a Wedge Pillow Help My Acid Reflux?" (16 August 2023). health.clevelandclinic.org/acid-reflux-pillow
- NIDDK, "Symptoms & Causes of GER & GERD" (last reviewed July 2020). niddk.nih.gov/health-information/digestive-diseases/acid-reflux-ger-gerd-adults/symptoms-causes
- American Academy of Pediatrics, HealthyChildren.org, "How to Keep Your Sleeping Baby Safe: AAP Policy Explained" (last updated 11 September 2026). healthychildren.org/English/ages-stages/baby/sleep/Pages/a-parents-guide-to-safe-sleep.aspx
Calm Eden sells some of the products mentioned here. Product details come from our own listings; we have not lab-tested them, and comfort varies from person to person. This guide is general information, not medical advice. If you have frequent heartburn, a diagnosed condition, or any of the warning signs above, talk to a doctor before relying on changes to how you sleep.