Many notice them without giving it much thought: those yellowish stains that quietly appear on your pillow over time. But they’re not just a cosmetic issue.
Sweat and Skin Oils Are the Main Culprits

As you sleep, your body releases moisture and oils. These substances gradually seep through the pillowcase and into the pillow itself, creating those signature yellow stains.
Damp Hair Makes It Worse

Going to bed with wet or damp hair creates the perfect environment for staining—and also promotes mold and bacteria growth deep inside the pillow.
Hair Products and Night Creams Leave Residue

Leave-in conditioners, serums, and facial moisturizers can all contribute to discoloration. The ingredients slowly absorb into the fabric and leave behind a tint.
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Saliva Plays a Role Too

If you tend to sleep with your mouth open or drool at night, that moisture can contribute to staining—especially over time.
Yellow Marks May Be Hiding Mold

You can’t always see it, but those spots might be covering the early stages of mold growth, which can be hazardous to breathe in nightly.
Dust Mites Thrive in Dirty Pillows

A warm, damp pillow is paradise for dust mites, which feed on dead skin and can trigger allergies, asthma, and irritation.
Machine Washing Is a Must

Experts recommend washing your pillow at 60°C to effectively eliminate bacteria and dust mites. A quick rinse won’t cut it.
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Sunlight Helps With Cleaning

Drying your pillow outside in the sun isn’t just refreshing—UV rays help naturally bleach stains and kill lingering germs.
Pre-Treatment Makes a Difference

Apply a mix of vinegar or hydrogen peroxide diluted in water directly on the stains before washing. It helps loosen buildup and improve cleaning results.
Pillows Don’t Last Forever

Even with proper care, pillows have a limited lifespan. If yours is older than two years and looking tired, it might be time to replace it.
Article is based on information from Den Offentlige
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