Pillowcases alone don't cause acne, but dirty ones can make it worse. Overnight, sebum, skincare products, drool, and bacteria build up on the fabric and reintroduce irritants to your face. Change yours frequently, especially if your skin is oily.
Twice a week.
Firms disagree on this. And yes, I do agree your pillowcase is not going to cause your acne. However, if you are extremely oily or oily prone or produce a lot of sebum, right, you can absolutely go ahead and change your pillowcase twice a week. The same way you wouldn't wear the same underwear every day of the week. At least I hope not. You change your pillowcase because the sebum that you're producing overnight, plus all the products, plus maybe you may or may not be somebody who drools that lives on your pillowcase, and then you're reintroducing all of beautiful bacterial environment plus oil production onto your face, which can then further exacerbate or accentuate the issues you may or may not be having on your skin. Number.
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