When the nights get hot and stuffy, turning on a fan can feel like a lifesaver. The gentle hum, the cool breeze—it all seems harmless. But while sleeping with a fan on overnight can help you stay comfortable, it may also have unexpected effects on your throat and respiratory health.

1. Dry Air Leads to a Dry Throat

Fans work by circulating air and evaporating sweat from your skin. However, this same airflow can also strip moisture from the air and from the tissues inside your nose and throat. As you breathe in this dry air for hours, the protective mucous membranes that line your respiratory tract start to lose moisture.

This can lead to a dry, scratchy throat when you wake up in the morning, making it uncomfortable to swallow or talk. People who sleep with their mouths open or have nasal congestion are even more prone to this problem.

2. Increased Risk of Throat Irritation and Inflammation

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