4 health consequences of using a fan all night

Turning on a fan directly over your bed all night can increase symptoms of asthma, allergies, runny nose, dry eyes, stiff neck, and cramps.

On hot days, when temperatures rise above 30 degrees Celsius, many families have the habit of turning on the fan all night, shining directly on the bed. However, Martin Seeley, a sleep expert at MattressNextDay, UK, said this habit can be harmful to health.

Electric fans help circulate air around a room, but they are not good for people with allergies and asthma. They can also blow dust mites, mold spores, pollen, and other allergens into the air, causing a variety of reactions in the body.

“So if you’re experiencing a lot of sneezing, watery eyes, a runny nose, an itchy throat, or difficulty breathing, make sure you clean the dust off the blades of your fan. If possible, upgrade to a fan with an air-filtering function to reduce the amount of pollen or dust mites in the room,” says Dr. Seeley.

If you use a fan regularly, experts recommend cleaning your bedroom regularly to reduce allergies. The convection of air dries out the nose, throat, and eyes, which also leads to bronchial irritation. This causes other side effects such as headaches, nasal congestion, and sinusitis.

A man turns on the fan to go to bed. Photo: Daily Mail — A man turns on the fan to go to bed. Photo: *Daily Mail*

The air from a fan blowing directly onto the bed can easily cause stiff necks and muscle pain. Dr. Seeley notes that if you already have pain in certain areas of your body due to exercise or incorrect sitting or lying posture, you should limit the fan blowing directly on these areas. Cool air that is concentrated for too long will cause the body to tense up and cramp.

"Some people also get a stiff neck right after using an electric fan. Take the fan off for a few nights to see if it improves," says Dr. Seeley.

If you don’t want to use a fan or air conditioner, experts recommend some ways to cool down your room and body. First, put your pillowcase in the refrigerator before going to bed. You can also soak your wrists in cold water while brushing your teeth, which will help your body cool down quickly.

On hot sunny days, experts recommend closing curtains to block direct sunlight. This will help keep the room temperature lower at night.

Exposure to ample daylight also helps regulate the body’s internal clock, signaling the brain when to be awake and when to rest. At the end of the day, lying in a completely dark room helps the body relax, fall asleep quickly, and forget about the heat.

Drinking at least 2 liters of water a day is also important, it helps increase energy and boost metabolism. Dehydration causes higher body temperature, causing fatigue and restlessness, making it difficult to sleep.

Thuc Linh (According to Express )

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