2. It can make your allergies worse.
If you have allergies, sleeping with the fan on is not a good idea. According to researchers, the wind can help circulate allergen particles, increasing your chances of asthma, dry eyes, eye allergies, and hay fever.
3. It’s one of the causes of muscle cramps.
The temperature at night tends to decrease fast and, while exposure to cold is one of the causes of muscle cramps, fans can expose you to more concentrated and constant cool air, blowing directly at you. On the other hand, if you’re experiencing hot nights, the air blowing from the fan can increase your core temperature, leading to heat-related illnesses, like nausea