When was the last time you replaced your pillow?

Do you know how often we should replace our pillows?

If you don't know, you wouldn't be the only one. Pillows are an afterthought for most of us.

I couldn't find any specific evidence stating when it's time to replace your pillow. But here’s a few things to know if you should decide you need a new pillow:

• If you have a non-foam pillow, fold it in half. If the pillow doesn’t spring back to its usual flat form, it’s time to buy a new one.,
• Even pillows that pass the fold test and ones that look like they’re in good shape (no yellow sweat stains) are probably hiding buildup of body oils, dead skin, and dust mites. And after spending almost a third of each day laying on our pillow (some of that tossing and turning), the filling inside will break down over time. So it’s wise to replace your pillows with some regularity.
• I did find this. "If you have a plain-old, inexpensive polyester pillow, you should be replacing it every six months,” says Michael Breus, Ph.D., a clinical psychologist and author of the book Good Night. “But if you have a memory foam pillow or any one with structural integrity, it’ll last you anywhere from 18 to 36 months.”
• He also says "While you’re buying a new pillow, you should think of buying two different pillows: one plush and one firm. At the beginning of the week, our body tends to be relaxed, meaning our head and neck need the least amount of support. But after days of work-related stress (and all that staring at our smartphones and computers), our neck muscles tend to be more tense and in need of support. So, switch to a firmer pillow on Thursday and Friday nights".