Raising the head of the bed about 6 to 10 inches on a firm under-mattress wedge tilts the upper torso and keeps stomach acid down at night.
Stacked pillows fail for a physical reason: they bend the neck while the torso stays flat, so stomach contents still have a level path up the esophagus. A firm foam wedge slid under the mattress at the head end lifts the shoulders, chest, and head as one unit, and most people notice a difference within a couple of nights.
The height that matters for how to elevate the head of your bed for GERD is 6 to 10 inches, measured where the mattress meets the headboard. Nailing that number, and keeping the slope gentle, does more than any specialty pillow on the market.
How High Should The Head Of The Bed Be Raised?
American College of Gastroenterology patient guidance puts the lift at roughly 6 to 10 inches at the head of the bed, and a 2022 ACG patient infographic narrows it to 6 to 8 inches.
Height is the easier number to work with, since the angle shifts with mattress length and wedge shape. Start near the low end, then add height if reflux still wakes you.
Stop before the bed turns into a ramp. Slopes that are too steep cause sliding toward the foot of the bed, pressure discomfort at the hips, and a harder climb in and out — the reasons people abandon a wedge after a week.
Two details decide whether the incline does anything. The lift has to raise the whole upper torso, from the lower ribs up, rather than propping only the head. And it has to be in place for the hours you actually sleep; a flat nap on the sofa undoes it.
| Elevation Method | What It Does | The Drawback |
|---|---|---|
| Under-mattress wedge, 6–10 inches | Tilts shoulders, chest, and head together | Creeps forward without a grippy base |
| Bed risers under the head legs | Lifts the whole frame at a fixed angle | Only if rated for the bed’s weight |
| Adjustable base, head section raised | Hinges the mattress around the hips | Bends the body instead of a full incline |
| Wedge placed on top of the mattress | Fast to add and easy to remove | Slides, and you can roll off it |
| Stacked or loose pillows | Lifts only the head and neck | ACG says pillows do not prevent reflux |
| Books or blocks under the legs | Cheapest lift available | Unstable and prone to slipping |
| 4–6 inch lift (older pregnancy handout) | Lower incline for pregnancy-era advice | Current general guidance says 6–10 inches |
Elevating The Head Of Your Bed: What Sits Under The Mattress
A purpose-built under-mattress foam wedge is the setup ACG recommends: wide, taller end beneath the mattress at the head, with the mattress forming a gradual incline over it. ACG’s guidance on acid reflux and GERD also notes that pillows are not an effective substitute, because they bend the body instead of lifting the torso.
- Lift the head end of the mattress — a second person makes this quick — and slide the wedge in with the wide edge against the headboard.
- Lower the mattress and lie on it. Your shoulders should sit higher than your hips, with no sharp bend at the waist.
- Press down on the head of the mattress and nudge it sideways. A wedge with a grippy base or a positioning strap holds better on smooth frames.
When it’s set correctly, the incline begins around your lower ribs and rises steadily to your shoulders with no gap under the mattress. If the mattress bunches or the wedge creases, it is either too short for the bed or too soft for your weight.
Bed risers under the head legs raise the entire frame at a set angle, and they only work when rated for the bed’s weight and the frame stays solid. Adjustable bases hinge the mattress at the hips, a different motion than a full incline. Books, blocks, and unsecured furniture supports are the one option to skip outright.
Some people should not attempt this alone. ACG educational material notes that older adults and people with balance, orthopedic, musculoskeletal, or frailty-related limits can find the higher climb in and out difficult or unsafe; a bed rail or a lower frame height makes the setup workable. Pregnancy adds another wrinkle: an older ACG handout recommended 4 to 6 inches, while current general guidance says 6 to 10, so ask a clinician which applies to you. If the frame itself is part of the problem, our tested roundup of beds for GERD covers adjustable and wedge-friendly options.
What Else Decides Whether Nighttime Reflux Eases?
Elevation works on gravity, not on stomach contents, so timing counts as much as the slope. ACG patient guidance says to avoid eating within 2 to 3 hours of bedtime, and ACG educational material describes staying upright after meals and avoiding meals within 3 hours of lying down.
Sleeping on your left side is the position ACG identifies as potentially helpful for nighttime heartburn. Trigger foods are more individual than the old lists suggest: ACG guideline materials state that routine elimination of every common trigger is not recommended, and that dietary changes should be tailored to what actually sets off your symptoms.
Treat the incline as one lifestyle measure among several, not a cure. Prescribed treatment and medical follow-up stay in place. Get medical care for trouble swallowing, painful swallowing, vomiting blood, black stools, unexplained weight loss, persistent vomiting, anemia, or chest pain.
Three moves carry most of the benefit:
- Move your last meal to three hours before lights out.
- Fall asleep on your left side.
FAQs
Does A Recliner Do The Same Job?
A recliner tilts the torso the same way a wedge does, and some people sleep better in one. The drawback is fit: it holds you semi-upright all night, which can load the lower back and hips. A wedge under the mattress lets you sleep in your own bed at a gentler angle, which is why ACG guidance points there first.
How Long Before Bed Should The Last Meal Be?
Two to three hours is the window ACG patient guidance gives, and ACG educational material describes avoiding meals within three hours of lying down. Stay upright during that gap rather than settling into a reclining chair. If dinner runs late, keep the portion small and give yourself at least two hours before getting into bed.
Will A Wedge Stop Reflux Completely?
No. Elevation is one lifestyle measure for nighttime symptoms, and it does not replace medical evaluation or prescribed treatment. Plenty of people still need medication, and reflux that continues despite an incline is worth a clinician visit. Trouble swallowing, black stools, vomiting blood, or unexplained weight loss need prompt medical attention rather than another inch of foam.
References & Sources
- American College of Gastroenterology. “Acid Reflux/GERD” Patient guidance supporting the 6–10 inch head-of-bed elevation and the note that pillows are not an effective substitute.
- American College of Gastroenterology. “About Acid Reflux & GERD Infographic” 2022 patient handout listing 6–8 inches of elevation for nighttime reflux.
- American College of Gastroenterology. “GERD Guideline Presentation” Clinical teaching material illustrating the 20-degree wedge angle and individualized dietary advice.