The Hidden Effects of Sleeping With a Fan on Your Throat — What You Should Know Before Bedtime

One common issue is a dry throat and mouth. Fans circulate air but also remove moisture, leaving your mucous membranes dry. This can cause irritation, painful swallowing, and even increase susceptibility to infections, since these membranes are your body’s first defense against germs. Cold, dry air can also irritate vocal cords, leading to morning hoarseness and soreness—especially troublesome for anyone who uses their voice frequently.