How dirty is the bed you sleep on every day?

This is the result of vacuuming a bed that one person slept on for a week.

What's in this big mass? Scientists from the Netherlands have analyzed this "dust".

Most of them are various fibers, such as cotton fibers, paper scraps, synthetic fibers, etc. in the bed and surrounding environment. These things are everywhere and there is no need to worry.

The other part is more surprising, they are a considerable amount of human body drops. There's everything from dandruff and hair to grease and sweat stuck to the bed.

Next we have to calculate carefully, how much can we save on the bed after sleeping for one night?


The first is dandruff. Scientists once made the estimate by asking subjects to wear a special small cup to collect and weigh the flakes of skin they shed after a day of activity.


In just one day, humans shed 500 million cells, an average of 20 million cells per hour. This means that if we stay in bed for 8 hours, 160 million cells will fall on your sheets in one night alone.An average person loses about 70 to 100 hairs every day.About 10g of sebum can be produced overnight.

A team of researchers from the California Academy of Sciences used vacuum cleaners to oversample household dust, and under high-power magnification searches, they saw such a startling discovery.

You thought it was a carpet.

Actually carpet.

This little thing about 0.2 mm long is secretly hiding among us.

Therefore, it is really not recommended to be too lazy when it comes to bed sheets. You have to wash them when they need to be washed and change them when they need to be changed.

According to the recommendations of the National Sleep Foundation, if possible, the ideal frequency is to change it weekly.

If you bathe every day, don’t sleep naked, don’t let smelly socks go to bed, don’t have pets, and don’t sweat much while sleeping… then it doesn’t matter if you change your clothes less frequently. After all, we still have a strong skin barrier!

If you are really too lazy to change it every Monday, or if the sun is out or something, you can at least take off the quilt every morning (yes, there is no need to fold it), and try to make the bed as breathable and dry as possible.