Sleep apnea pillows: what the research shows

A sleep apnea pillow can help some people a little, mainly by keeping them off their back or raising their head. Small studies of positional pillows and head elevation show fewer breathing pauses in certain groups, especially people whose apnea is worse when they lie face up. No pillow has been shown to replace proper treatment, so think of one as a possible add-on that your sleep specialist knows about.

What is a sleep apnea pillow?

A sleep apnea pillow is any pillow sold to make breathing easier for people with obstructive sleep apnea. The term covers three quite different products: positional pillows that keep you on your side, wedges or inclined pillows that raise your head and upper body, and CPAP pillows shaped to make room for a mask.

Each type works on a different problem. Positional pillows target the extra airway collapse that happens on your back. Wedges and inclines use gravity to change how the airway sits. CPAP pillows don't treat apnea at all. They are meant to make the treatment you already have more comfortable. Knowing which problem you're trying to solve is the first step to choosing one, and the second is knowing what your sleep study showed. Our guide to what AHI means explains how severity is measured.

Do positional pillows help sleep apnea?

Positional pillows can help some people with positional sleep apnea, but the results are mixed. In a 2018 study, a side-sleeping positioning pillow cut back sleeping and the apnea-hypopnea index (AHI) after one night and after a month. A 2025 home trial found no drop in back sleeping with a pillow.

The 2018 study enrolled 28 people with positional obstructive sleep apnea and tested them over three nights in a sleep lab. With the pillow, they spent less time on their backs and had significant drops in AHI, sleep fragmentation and oxygen dips. Sleepiness and sleep quality scores also improved, and people reported high satisfaction and regular use at one and six months. It was a single group with no comparison pillow, so it can't rule out other explanations, but the results were encouraging.

The 2025 trial was smaller and set at home. Researchers screened 102 people with positional sleep apnea and included 19 who slept on their backs at home. Each person tried a positional pillow and a vibrating belt in random order. The belt significantly reduced time on the back. The pillow did not. The authors noted that back sleeping was less common at home than in the lab, and that the small sample limits what the study can show.

An older 2004 study tested a triangular inclined pillow with room to rest an arm under the head while lying on the side. In 22 people, average breathing events fell from 17 an hour to fewer than 5 in those with mild to moderate sleep apnea, and snoring decreased. That was a single night with no control group.

Our article on positional sleep apnea explains how it's diagnosed and what positional therapy can and can't do.

Who might a positional pillow help?

A positional pillow is most likely to help someone whose sleep study shows positional obstructive sleep apnea, meaning most breathing events happen on the back. People in the pillow studies mostly had mild to moderate apnea. If your events happen in every position, a pillow that keeps you on your side has less to work with.

That's why it's worth asking your doctor whether your sleep study report breaks down your AHI by body position. Many reports do. If yours shows a big difference between back and side sleeping, a positional pillow is a sensible thing to discuss. If it shows severe apnea on your side as well, a pillow alone is unlikely to be enough.

Cleveland Clinic lists changing your sleeping position so you're not on your back as one of the treatment options for sleep apnea, alongside CPAP, oral appliances, nerve stimulation and surgery. It also says the choice depends on the type and severity of sleep apnea, which is a decision for your provider. Our general guide to the best sleep position for breathing covers side sleeping in more detail.

Can a wedge pillow help sleep apnea?

A wedge pillow may help a little by raising your head and upper body, though it hasn't been tested as directly as you might expect. The studies we found tilted the head of the bed instead. Mild elevation of 7.5 degrees and steeper elevation of 30 degrees both lowered AHI in people with obstructive sleep apnea.

In the 2017 study, 52 people with obstructive sleep apnea slept one night flat and one night with the head of the bed raised 7.5 degrees. Median AHI fell from 15.7 to 10.7 events an hour, and the lowest oxygen level during the night improved. Sleep stages stayed similar. In a small subgroup who slept flat again afterward, AHI went back to where it started, so the benefit only lasts while you're raised.

A 2025 study of 30 people with obstructive sleep apnea compared lying flat on the back, a 30-degree raised position and side sleeping. AHI dropped from 25.7 on the back to 17.8 when raised, and to 14.8 on the side. Half of the participants cut their AHI by at least 50% with the head raised. Side sleeping still did slightly better than elevation.

A wedge raises your upper body in a similar way, but it isn't identical to tilting a whole bed, and people can slide down a wedge during the night. If you want to try one, mention it to your doctor so they can judge whether it fits your results. If snoring is your main concern rather than apnea, our article on anti-snoring pillows covers that research.

Do memory foam or cervical pillows make a difference?

A memory foam pillow may change snoring in people with sleep apnea, but the evidence is very early. In a 2022 preliminary study of 32 people, the memory foam pillow cut snoring events by about 47% compared with a standard lab pillow. The study lasted a few hours per pillow.

The researchers also found differences between pillow types in oxygen desaturation and heart rate. Their main point was that pillow choice is rarely controlled in sleep apnea research and may matter more than people assume. They called for dedicated studies before any firm conclusions. So a supportive pillow that keeps your head and neck comfortable is a reasonable choice, but there isn't enough research to say any particular shape treats apnea.

Are CPAP pillows worth it?

CPAP pillows are mainly about comfort, and that can matter. In a 2016 study of 23 people starting CPAP, a gel pillow with side cutouts for the mask didn't change CPAP pressure, mask leaks, residual AHI or nightly hours of use. People were significantly more satisfied with it than with their own pillow or a foam version.

That's a useful, honest result. A CPAP pillow won't make your machine work better, but if your mask presses into a regular pillow when you lie on your side, a cutout design may make nights more comfortable. Comfort counts, because CPAP only helps when you wear it. If you're struggling with your mask, your sleep team can also help with fit and mask type, and our guide to dry mouth with CPAP covers one common complaint.

How do the pillow types compare?

The pillow types differ in what they target and how strong the evidence is. Positional pillows have the most direct research in sleep apnea, head elevation has a few lab studies, and CPAP pillows have one small comfort study. None has long-term trial evidence.

Is a pillow a substitute for sleep apnea treatment?

A pillow is not a substitute for sleep apnea treatment. The pillow studies are small and short, they mostly included people with mild to moderate or position-dependent apnea, and none followed people long enough to show lasting health benefits. Untreated sleep apnea is linked with high blood pressure and heart problems, so getting proper care matters.

Cleveland Clinic lists complications of sleep apnea that include heart rhythm problems, high blood pressure and heart failure, and daytime sleepiness that can be dangerous when driving. Our article on sleep apnea and high blood pressure explains one of those links.

If you haven't been diagnosed, start with a doctor rather than a pillow. Loud snoring with gasping or choking, breathing pauses someone has noticed, and daytime sleepiness are all reasons to ask about a sleep study. Our list of sleep apnea warning signs can help you describe what's going on, and home sleep apnea tests explains one way to get tested.

If you've already been diagnosed, a pillow can be a reasonable extra step to talk through with your sleep specialist. Bring your sleep study results, ask whether your apnea is positional, and don't stop or cut back on prescribed treatment because a pillow seems to help. A follow-up sleep test is the only way to know whether a positional approach is doing enough.

Read next

• Positional sleep apnea: when sleeping on your back is the problem
• Sleep apnea treatment options
• Do anti-snoring pillows work?

* This content is for informational and educational purposes only and is not medical advice. It is not intended to diagnose, treat, cure or prevent any disease or health condition. Talk to a qualified healthcare provider about your health.