While opening your bedroom window at night can seem like a natural way to enjoy fresh air, experts caution that it may disrupt sleep and pose health risks. Sudden temperature drops can cause the body to adjust repeatedly, preventing deep rest and leaving sleepers feeling tired or achy. Additionally, open windows can allow allergens, dust, and pollutants to enter, which can irritate the respiratory system and disturb those with allergies or asthma.

To enjoy clean air safely, it’s better to ventilate your room before bed or use an air purifier. Balanced humidity, proper ventilation, and temperature control offer the benefits of fresh air without exposing your body to nighttime discomfort. Experts recommend opening windows briefly during the day to refresh indoor air and reduce CO₂ levels, rather than leaving them open overnight.

In summary, while the idea of sleeping with an open window may seem appealing, it’s important to consider the potential downsides, such as temperature fluctuations and exposure to allergens. Implementing alternative methods, like pre-bedtime ventilation and using air purifiers, can help maintain air quality and support better sleep without the associated risks.