Waking up with neck pain? Sleep experts say pillow stacking may be to blame

Picture your perfect bed — how many pillows are on there? If you imagine two pillows on each side, then you might be a “pillow stacker.”

“[Pillow stacking is] not automatically bad — but it often becomes a problem," says Dr. Raj Dasgupta, chief medical adviser for Sleepopolis. “Stacking pillows usually pushes the head and neck into flexion, meaning the chin is angled toward the chest." Over time, Dasgupta says this can lead to a host of negative consequences, from neck strain and disrupted sleep quality to masking signs of an underlying medical issue, like heart failure or obstructive sleep apnea. In some cases, it may even contribute to morning headaches.

But what if sleeping with two or more pillows is the only way you can actually get some shut-eye at night? And how do you know whether your pillow setup is supporting your spine — or sabotaging it? We spoke with three sleep experts to understand why pillow stacking isn't recommended, the consequences of doing so and the best pillow setup to better support your neck and get more restorative rest.

Why experts don't recommend pillow stacking

We spoiled the answer to "should you pillow stack" in the intro — but let's dive deeper into why it’s a habit worth breaking. While pillow needs can vary depending on whether you're a back, side or stomach sleeper, most experts agree that the goal is the same: keep your spine in neutral alignment. That’s where stacking can become an issue.

Dr. Hossein Aziz, board-certified spine surgeon at DISC Sports and Spine Center, says the question of pillow stacking is one he gets regularly: "Patients come in with neck pain or stiffness, and when I ask about sleep, they tell me they use two or three pillows because it feels comfortable at first. The problem is that stacking pillows under the head usually forces the neck into a flexed position for hours. That increases stress on the cervical discs, facet joints and surrounding muscles."

Part of the reason it can feel good initially is simple — elevating your head can create a sense of support or relief. But over the course of six to eight hours, that prolonged flexion adds up.

Over time, he says this can absolutely contribute to chronic neck pain. In fact, he adds, "Over the years, I have seen poor sleep posture contribute to worsening degenerative changes in the cervical spine. Chronically poor alignment can accelerate disc wear, contribute to muscle imbalance and aggravate conditions like cervical spondylosis or nerve compression. For patients who already have neck arthritis or have undergone spine surgery, poor alignment at night can slow recovery and prolong symptoms."

He also cautions that sleeping in this position can lead to waking up with a headache at the base of your skull. And while side sleepers may need a higher-loft pillow to fill the space between the shoulder and neck, that's different from stacking multiple soft pillows that compress unevenly and push the head forward.

Dasgupta agrees that pillow stacking can cause misalignment, which, over time, can contribute to neck and shoulder pain. He also cautions that pillow stacking may also be masking signs of something more serious: "People may unconsciously use extra pillows to elevate their head and chest, which helps alleviate symptoms of certain conditions that are worse when lying flat. If you recently started needing two pillows to sleep comfortably, or if you experience other symptoms like shortness of breath, fatigue, swelling in your legs or chest pain, it's recommended that you consult with a health care professional for a proper evaluation."

Signs your pillow setup is what's hurting your neck or back

So, how do you know your stacking habit is contributing to your neck, shoulder or back pain?

Dasgupta and Aziz say that if you consistently wake up in the morning with one or more of these symptoms, it’s time to take a closer look at how your pillow setup might be affecting your sleep posture:

• Neck stiffness
• Headaches at the base of your skull
• Shoulder pain or stiffness
• Tingling in the arms
• Frequently adjusting your pillows during the night

"If pain improves as the day goes on, that usually means there’s a sleep alignment issue," says Dasgupta.

In other words, if you feel worse when you wake up but loosen up after moving around, your pillow height — or lack of proper support — could be part of the problem.

Of course, pillows are just one potential culprit behind your inability to turn your neck to the left (or right) in the morning. Your sleep position, overall posture and mattress all play a role too — which is why choosing the best mattress for your sleep style is just as important as finding the right pillow.

How to properly support your neck

According to Aziz, the issue isn’t about the number of pillows you’re using — it’s about whether your neck stays properly aligned overnight. "The goal is simple spinal alignment. I explain it to patients in my office by counseling them that their neck should look straight from the front and side when they are lying down," says Aziz. "If you're unsure, having a family member look at your alignment or even taking a quick photo can be surprisingly helpful," he adds.

In other words, your head shouldn’t tilt forward, drop backward or lean to one side. If it does, your pillow likely isn’t doing its job.

So, how do you find the best pillow to promote better alignment? Our experts agree that it comes down to loft (height) and firmness — and the right combination depends largely on your sleep position.

• Stomach sleepers: "Stomach sleepers typically need a very low loft or no pillow at all to avoid neck rotation," says Dasgupta.
• Back sleepers: "Back sleepers usually do best with a medium loft that supports the curve of the neck without lifting their head too much," says Dasgupta. Specifically, he recommends trying a memory foam or adjustable-fill pillow. He also says placing a pillow under your knees can help maintain better spinal alignment.
• Side sleepers: "Side sleepers typically need a higher loft to fill the space between their shoulder and head," says Dasgupta. He recommends choosing a firmer pillow and placing a second pillow between your knees to help reduce spinal strain. Cuddling up with a body pillow can also be effective, says Lauri Leadley, founder and clinical sleep educator at Valley Sleep Center.

For those dealing with chronic neck pain, Aziz says he often recommends "cervical contour pillows that support the natural curve of the neck while allowing the head to rest comfortably. Many of my patients also do well with firmer pillows rather than very soft ones."

And if lower back pain is part of the equation, you may just need a small adjustment. "Placing a pillow under the knees for back sleepers or between the knees for side sleepers can make a noticeable difference," he adds.

FAQs

Does stacking pillows help with reflux or snoring?

According to Aziz, not really. "Stacking pillows under the head alone is usually not effective and often creates neck problems. When patients in my practice have reflux or snoring issues, I recommend elevating the upper body as a unit. A wedge pillow that supports the chest and torso or an adjustable bed works much better and avoids excessive neck flexion."

How often should you replace your pillow?

Aziz and Dasgupta agree that you should be swapping out your pillows every one to two years — far more often than many of us actually do. Over time, pillows lose their shape, firmness and ability to properly support your neck. "In my experience, old, flattened pillows are a very common contributor to neck pain. If a pillow no longer holds its shape or rebounds when you press on it, it is no longer providing meaningful support, even if it feels familiar," says Aziz.

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