Why do pillows turn yellow?
There are several reasons why pillows turn yellow, but the most common cause of these spots is sweat. People sweat while they sleep, some more than others. The more you sweat, the more moisture seeps into the pillowcase and onto the pillow, causing the stains. And when you think about how many hours your head and face are on that pillow, that’s a lot.
In addition to sweat, your hair can be the culprit: specifically, if it’s particularly oily or if you often go to bed with wet or damp hair. Certain types of make-up and skin care products can also be the cause of these yellow spots. It can also be drool. Putting a waterproof pillow protector before your pillowcase can help prevent much of the discoloration.
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