Raising the head of your bed by 6 to 8 inches is one of the most effective non-medication strategies for reducing acid reflux symptoms at night, and it also helps with obstructive sleep apnea. The goal is to create a gentle slope from head to foot so gravity keeps stomach acid where it belongs and helps keep your airway open. There are several ways to do this, from free DIY fixes to adjustable bed frames, and each has trade-offs worth knowing about.
Why Elevation Helps
When you sleep flat, gravity no longer prevents stomach acid from creeping up into your esophagus. Elevating the head of your bed creates a downhill slope that lets gravity do its job, reducing both the frequency and duration of reflux episodes overnight. Clinical trials have consistently used elevations of 20 to 28 centimeters (roughly 6 to 11 inches) and found meaningful symptom relief.
For sleep apnea, the mechanism is different but equally straightforward. Lying flat allows gravity to pull your tongue and soft tissue backward, narrowing your airway. Even a mild elevation of about 7.5 degrees reduces airway collapsibility and increases the space in your throat. One study found that this modest incline reduced sleep apnea severity by nearly 32% on average in people with mild to moderate cases. Elevation also prevents fluid from pooling in the neck tissues during sleep, which can further contribute to airway obstruction.
How High to Go
For acid reflux, most clinical trials used blocks or wedges between 20 and 28 centimeters, which translates to about 6 to 11 inches. A good starting point is 6 inches (roughly 15 centimeters) at the head-side legs of your bed. This creates a slope of around 10 to 15 degrees, enough to make a real difference without feeling like you’re sleeping on a hill. If 6 inches doesn’t fully resolve your symptoms, you can work up to 8 inches. Going beyond 11 inches is rarely necessary and makes it harder to sleep comfortably.
For sleep apnea, even a gentler incline can help. Research showing a 32% improvement in severity used a 7.5-degree angle, which works out to roughly 5 to 6 inches of elevation at the head of a standard bed.
Method 1: Bed Risers or Blocks Under the Legs
This is the most commonly studied method and the one used in most clinical trials. You place solid blocks or commercial bed risers under the two legs (or posts) at the head of your bed, leaving the foot of the bed on the floor. The result is a whole-bed tilt that keeps your entire body on a gentle slope, which is better for spinal alignment than propping up just your upper body.
Commercial bed risers come in plastic, wood, or metal. Look for risers with a recessed cup or notch on top that holds your bed leg securely in place. Weight capacity varies widely by material and brand, so check the rating before buying, especially if you have a heavy bed frame or mattress.
To make your own, cut solid wooden blocks or sections of 4×4 lumber to your target height. Drill a shallow hole or carve a square notch into the top of each block so your bed leg sits snugly and can’t slide off. Sand the surface to prevent splinters, and attach felt pads or non-slip rubber pads to the bottom to protect your floor and prevent the blocks from shifting. If you have a metal bed frame, reinforce the connection with small brackets or screws so the frame can’t walk out of the notch overnight.
A few important safety notes: make sure both risers are exactly the same height to avoid wobbling. Use hardwood or dense lumber rather than soft pine, which can compress under sustained weight. Check your risers every few months for cracks or signs of wear. And always place them on a hard, level surface rather than thick carpet, which can cause them to tilt.
Method 2: Foam Wedge Pillows
A foam wedge pillow sits on top of your mattress and props up your head and torso at an angle. These are the most portable option and require no modifications to your bed, which makes them popular for renters and travelers. Clinical trials have used wedges around 20 to 25 centimeters (8 to 10 inches) high, angled at about 20 to 22 degrees.
The main downside is slippage. Many people find they slide down the wedge during the night, ending up flat again by morning. Stacking regular pillows has the same problem and is generally worse because it bends you at the waist rather than creating a gradual slope, which can actually increase abdominal pressure and make reflux worse.
If you use a wedge, there’s a simple trick to stay in place: roll up a towel and position it under your body right where the tops of your legs meet your bottom. This creates a small ridge that prevents you from sliding downward. Some wedges also come with a non-slip surface or textured cover that helps grip your sheets.
Wedge pillows generally don’t match the comfort of a whole-bed tilt, and people who have tried both often prefer the bed riser approach or an adjustable bed. But wedges work well enough for mild symptoms, short-term use, or situations where you can’t modify the bed frame itself.
Method 3: Under-Mattress Wedges
An under-mattress wedge is a large foam or inflatable insert that goes between your mattress and the bed frame (or box spring). It lifts the entire head section of the mattress rather than just your upper body, creating a more gradual slope similar to bed risers. These avoid the slippage problem of on-top wedge pillows because your mattress surface stays flat and your sheets stay in place.
The trade-off is that these wedges can cause a lighter mattress to slide forward over time, and they don’t work well with memory foam mattresses that conform tightly to whatever surface they’re on (the wedge shape can transfer through and create an uneven sleeping surface). They work best with innerspring or hybrid mattresses that are rigid enough to bridge the slope.
Method 4: Adjustable Bed Frames
An adjustable bed frame lets you raise and lower the head (and often the foot) of your mattress with a remote control. This is the most precise and convenient option. You can fine-tune the angle night by night and raise your knees slightly at the same time, which is the most effective way to prevent sliding. People who switch from wedges to adjustable frames generally find the comfort improvement significant.
The cost is the obvious barrier. Adjustable frames range from a few hundred to several thousand dollars, and you’ll need a compatible mattress (most memory foam and latex mattresses work; traditional innerspring mattresses with a box spring typically don’t). If you already deal with nightly reflux or moderate sleep apnea, though, this is often the most sustainable long-term solution.
Choosing the Right Method
- Best for most people: Bed risers or wooden blocks. Inexpensive, well-studied, and comfortable because the whole bed tilts evenly. Your mattress, pillows, and sleep position stay essentially normal.
- Best for renters or travelers: Foam wedge pillow. No modifications needed, easy to move, but expect some adjustment period and possible slippage.
- Best for long-term comfort: Adjustable bed frame. Most control over your position, eliminates sliding, and allows you to raise your knees simultaneously.
- Best budget DIY option: Two matching pieces of 4×4 lumber cut to 6 inches, notched for your bed legs, with rubber pads on the bottom. Total cost is usually under $10.
Who Should Be Cautious
Head-of-bed elevation isn’t appropriate for everyone. If you have significant swelling in your legs or feet, or a condition involving poor circulation in your lower limbs, tilting the bed can make fluid pooling in the legs worse. People with lower limb edema or venous insufficiency should talk to their doctor before trying this approach.
If you share a bed with a partner who doesn’t need elevation, bed risers and under-mattress wedges affect both sleepers equally. A wedge pillow is one workaround since only one person uses it, but an adjustable split-king frame (where each side moves independently) is the more comfortable solution for couples with different needs.