It's Probably Time to Replace Your Pillows—Here's How Often Experts Recommend

A soft, plush pillow is essential to a good night's rest. But over time, pillows change shape due to regular use and washing, which can make them less comfortable to sleep on. What's more, a pillow's fabric can become more permeable to dust mites, which can cause allergies. To ensure a quality night's rest and protect yourself from allergies, it's important to replace your pillows regularly. Ahead, experts share how often you should replace pillows and their best tips for making them last longer.

How Often to Replace Pillows

Aim to replace bed pillows every two years or sooner, depending on the manufacturer’s recommendations. "After two years, around 10 percent—and sometimes even more—of the weight of your pillow can be from dead dust mites and their droppings," says Kenneth Mendez, president and CEO of the Asthma and Allergy Foundation of America.

Dust mites are tiny bugs that can't be seen without a microscope. They live practically everywhere, especially in fabric-covered items in your house and bedroom. "You can be allergic to both the body parts and droppings of dust mites," says Mendez. "For people with dust mite allergy, the risk is greater exposure to a common allergen—which could lead to worsening allergy symptoms."

Signs It's Time to Replace Your Pillows

Beyond using time as an indicator, some additional tell-tale signs will signal that it's time to replace your pillows.

They Are Discolored

Over time, pillows will become discolored from frequent use. "Discoloration indicates the buildup of sweat, oils, and dead skin cells," says Marla Mock, president of Molly Maid, a Neighborly company. "These can create a breeding ground for bacteria and allergens, compromising the pillow's hygiene and your health."

They Have Lost Their Shape

A pillow that has lost its shape no longer provides proper support for your neck and head as you sleep. "This can lead to discomfort, neck pain, and poor sleep quality," says Mock. "You can test this by folding the pillow in half; if it doesn't spring back to its original shape, it's time to replace it."

They Smell Unpleasant

Replace your pillow immediately if you notice it smells off. "An unpleasant odor coming from your pillow could be a sign of mold, possibly due to sleeping on the pillow with damp hair," says Mendez. "Some people are allergic to certain types of mold and inhaling mold poses health risks even for people who do not have allergies."

Your Allergies Have Worsened

If you notice your allergies are worse at night or after you’ve slept on your pillow, it could be a sign your pillow has collected allergens that trigger your symptoms, says Mendez. "If the symptoms persist after washing the pillow, it’s time to consider replacing it," he says.

Types of Pillows That Last the Longest

Generally, memory foam and latex pillows last the longest. "These materials are more durable and resistant to losing their shape compared to down or polyester pillows," says Mock. "However, the longevity also depends on how well the pillow is maintained and the quality of the materials used."

Additionally, you should look for pillows that are "Asthma & Allergy Friendly," which is a certification mark operated by Allergy Standards Limited (ASL ). According to Mendez, bedding that has this certification meets strict standards, such as the outer fabric must block allergens, it's easy to clean to remove allergens, and contains no chemicals known to trigger asthma and allergy symptoms 

Tips for Making Your Pillows Last Longer

These tips will ensure your pillows make it to the two-year mark.

• Regular Cleaning: Wash machine-friendly pillows regularly in hot (130 degrees Fahrenheit) water. For non-machine-friendly pillows, wash them by hand in a sink or bathtub filled with warm water and detergent, says Mock.
• Proper Washing Techniques: When machine washing, wash two pillows at a time to maintain balance and prevent lumping, says Mock, adding that you should use a mild, liquid detergent and follow care instructions on the label.
• Drying: Dry pillows on low heat in a dryer, using tennis balls to help keep the filling from clumping, says Mock. If the pillow isn’t dryer-safe, air dry it thoroughly by wrapping it in a towel to absorb moisture , then let it air dry completely.
• Protective Covers: Use pillow protectors to shield against dust mites and other allergens, and wash these covers regularly, says Mock.