Another hidden issue is hygiene. Fan blades often collect dust and microscopic allergens. When the fan spins, it can blow those particles directly into your breathing zone. Inhaling this contaminated air for hours can irritate the throat and lungs, especially for people with sensitive airways or respiratory conditions.

If your fan hasn’t been cleaned regularly, it may also circulate bacteria or mold spores—both of which can cause coughing, congestion, or throat discomfort the next morning.

4. Tips to Protect Your Throat While Using a Fan

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