The average man changes his pajamas every 13 nights. Women typically wait for 17 nights to throw their pajamas in the laundry. Most women have multiple pairs of pajamas and tend to forget how long they’ve been out for. While crawling into bed in a well-worn set of pajamas might seem harmless, it can have some alarming consequences.

We at Bright Side were curious to find out how the habit of going to bed in your old pajamas could affect you.

1. You’re sleeping in an unhealthy environment.

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When you wear the same pajamas night after night, your immune system is constantly fighting against microbes, respiratory complications, and allergies. All of those factors can weaken your body’s defenses, making it harder to protect you from viruses.

How often do you change your pajamas? What was the longest time you wore your nightwear before washing it?

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