99% of people don’t know this: That’s why you shouldn’t sleep with a fan switched on at night.

Do you sleep with a fan on at night?

Many people do – but it might not be such a good idea.

There are some surprising reasons why you should turn off your fan at night.

Curious? Then read on!

Can dry out skin and eyes
A fan can contribute to dry skin and eyes while you sleep. The constant airflow promotes moisture evaporation, which can leave your skin and eyes feeling dry or irritated in the morning.

If you don’t want to give up your fan, a humidifier can help make the air in your room more comfortable.

Can worsen allergies and asthma
A fan not only moves air but also stirs up dust, pollen, and other allergens in the bedroom.

For people with allergies or asthma, this can exacerbate symptoms such as sneezing, a stuffy nose, or breathing difficulties, thus disrupting their sleep.

Can promote muscle tension
Do you sometimes wake up with a stiff neck?

If the cool airflow is directed at one part of the body all night, muscles can cool down and become tense. Some people report neck, shoulder, or back pain in the morning as a result.