Why many experts advise against sleeping with window open

The Bottom Line

Sleeping with the window open isn’t inherently dangerous, but it carries risks that vary depending on your environment, health, and safety considerations. Experts generally advise caution, especially for those with allergies, respiratory conditions, or security concerns.

The ideal approach? Fresh air without unnecessary exposure—think screened windows, filtered airflow, or opening the window briefly before bed instead of leaving it wide open all night.

If you want, I can:

• Make this shorter for social media or quick tips
• Turn it into a “5 tips for safe fresh-air sleep” listicle
• Add a seasonal guide for when it’s safer to sleep with windows open
• Include expert quotes or studies on sleep and air quality

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