Your Pillow Has an Expiration Date — And You’re Probably Ignoring It

Most people know that sheets and pillowcases need regular washing. The pillow itself is easier to forget. Unlike sheets, it may not look dirty after months of use. And because it changes gradually, you may not notice it becoming flatter or less supportive. Or maybe you’ve noticed more neck or shoulder stiffness in the morning and that your pillow’s bounciness has been gone for months — or years — and thought it was fine.

But no, a pillow does not last forever.

There is no medically proven expiration date for every pillow, but you should generally replace it every one to two years — or even earlier.

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How Often Should You Change Your Pillows?

The Asthma and Allergy Foundation of America (AAFA) recommends replacing your pillow every two years, on top of cleaning your bedding regularly.

But if you’re the type to hold onto your pillow much longer, you’re not alone. In a 2021 YouGov survey of 6,658 U.S. adults, only 34 percent said they replaced their pillows at least every two years. About one in five waited three to four years, while others reported keeping theirs for five years or longer.

Signs It’s Time for a New Pillow

You do not always need to wait for the two-year mark. Sometimes the pillow makes its condition fairly obvious.

It may be time for a replacement if:

• It stays flat even after you fluff it.
• It has a permanent head-shaped hollow.
• The filling has become lumpy or uneven.
• You have to fold, bunch or stack it to feel supported.
• It has a musty, sour or oily smell that remains after appropriate cleaning and thorough drying.
• It has heavy staining, damaged seams, leaking filling or crumbling foam.

If you see mold on the pillow itself, discard it rather than trying to clean it. The U.S. Environmental Protection Agency notes that mold can penetrate porous materials and become difficult or impossible to remove fully. Because a pillow is thick and absorbent, washing the visible patch may not remove mold inside the filling.

“The general rule is that your pillow should keep your head in neutral alignment with the rest of your spine, whatever position you’re sleeping in.”

Dr. Andrew Gorecki, co-founder and CEO of MovementRx

Don’t Rely Only on What You Can See

A pillow can look perfectly fine while changing on the inside.

A pillowcase provides a barrier between your face and the pillow, but it is not impenetrable. Over time, sweat, saliva, skin oils, shed skin cells, cosmetics and hair products can reach the filling.

Pillows can contain house-dust-mite allergen as well. Dust mites feed mainly on shed skin and thrive in warm, humid environments. They do not bite, but proteins in their waste and remains can trigger symptoms in people who are allergic.

These symptoms can include sneezing, congestion, itchy or watery eyes, coughing and wheezing.

To keep your pillow clean and comfortable:

• Wash pillowcases and other bedding weekly.
• Consider a zippered allergen-impermeable pillow cover.
• Follow the manufacturer’s washing instructions.
• Dry washable pillows completely before using them again.
• Fluff or redistribute loose filling regularly to reduce uneven clumping.
• Keep bedroom humidity under control if the room tends to stay damp.

Cleaning may reduce surface dirt and allergens and help a pillow remain usable. What it cannot do is restore filling that has permanently flattened, clumped or broken down.

What Your Pillow Loses

Your pillow is compressed under the weight of your head for several hours every night. Eventually, polyester fibers clump, feathers shift and foam softens or develops a lasting indentation. These changes may happen so gradually that you become used to it. You may start sleeping with a hand under the pillow, folding it in half or adding another pillow without realizing why.

Some sleep experts suggest folding a loose-fill pillow in half and seeing whether it springs back. If it stays folded, it may have lost much of its resilience.

That Plumpness Matters

As the pillow loses loft — its usable height — it may no longer hold your head and neck in the same position. 

In a small 2016 laboratory study, researchers tested four pillow heights in 10 healthy young adults lying on their backs. Changing the height altered the pressure beneath the head and neck, as well as the modeled alignment of the cervical spine.

A review of pillow ergonomics — the study of designing products to fit the body and reduce strain — reached a similar conclusion. An appropriate height can support the head and neck, reduce stress on the cervical spine and help the neck and shoulder muscles relax.

“The general rule is that your pillow should keep your head in neutral alignment with the rest of your spine, whatever position you’re sleeping in,” Dr. Andrew Gorecki, co-founder and CEO of MovementRx, a remote monitoring system that allows physical therapists to assign customized exercises and track patients’ progress between appointments, told Nifty50+.

Side sleepers generally need enough height to fill the space between the mattress and the side of the head. Back sleepers usually need less.

Gorecki added that the right pillow height depends partly on your sleeping position.

“For side sleepers, which is most older adults, that means a pillow thick enough to fill the space between your ear and your shoulder without tilting the head up or down,” he said. A pillow that is too thin allows the head to drop toward the mattress, while one that is too thick pushes it toward the ceiling. Either position can strain the neck for hours.

Back sleepers generally need a thinner pillow — just enough to support the natural curve of the neck without pushing the head forward. According to Gorecki, an overly thick pillow forces the chin toward the chest, which can contribute to chronic neck pain in older adults.

Why This Matters More for Older Adults

Proper support may become more important if you already have arthritis, degenerative changes in the cervical spine, reduced neck movement or chronic neck and shoulder pain.

“Pillow height matters more with age, not less,” Gorecki said.

Younger necks are generally more forgiving of awkward sleeping positions. By our 50s and 60s, however, the discs in the cervical spine have lost some of their water content, the small joints may be less mobile, and the surrounding muscles may tire more easily, Gorecki explained. “All of that means the wrong pillow height creates real problems — morning neck pain, headaches, tingling into the arms, and disrupted sleep.”

“If you wake up with neck stiffness that clears within 15 to 20 minutes of moving around, your pillow is likely fine,” Gorecki said. “If the stiffness lasts longer than that, or if you’re waking up with headaches, tingling or shoulder pain, the pillow is probably part of the story. That’s worth troubleshooting before you accept it as ‘just getting older.’”

It May Be Time for a New Pillow

A pillow does not come with a precise expiration date, but one to two years is a sensible point to give it a serious check — and usually replace it.

Do it sooner if the pillow stays flat, becomes lumpy or damaged, develops a lasting odor or visible mold, cannot be cleaned and dried properly, or no longer supports you comfortably. And if your pillow lost its bounce years ago? It has probably given you all it has.