In case you hadn't noticed, the UK's bloody hot right now - we're talking scorching temperatures of up to 32°C in certain areas.
Although it's tempting to shut yourself in a dark room with your fan running all night long, you might want to rethink that strategy.
Other than contributing to the already rising electricity bills, it can also have an impact on your sleep.
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While it's not exactly a medical emergency, doing this every night could leave you feeling under the weather.
As explained by Sleep Advisor, fans blow dry air around the room, which could lead to all manner of problems such as dry skin and sinus issues.
The sleep publication added: "If the dryness is particularly extreme, it can result in your body producing excess mucous to try to compensate. Then, you’re more susceptible to blockage, stuffiness, and sinus headaches."
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Another less obvious complication is that you may wake up with sore muscles, as concentrated cool air can make your body tense up and cramp.
This is certainly on the more extreme end of things, and we should also point out that there are some positives to sleeping with a fan on too such as circulating stale air and helping to regulate body temperature.
If there’s a lot of noise pollution where you live, they're also a cheap and effective way to provide some background sound to drown out the racket going on outside.
Ultimately, Sleep Advisor suggests to avoid spending the night with the fan cranked up if it's triggering any allergy and asthma symptoms or if you're experiencing dry skin, eyes, mouth or sinuses.
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"Sometimes the equipment also gets excess build-up of pollen and particles that are impossible to remove," they continued.
"If that’s the case, consider an upgrade. Or, if it’s causing issues by drying out your skin and insides, maybe you need something that rotates instead of one that blows directly on you all night.
"You may even want to consider one that has a timer, so you’ll be able to use it to lull you to your dreamland but have it turn off automatically to prevent the constant blast of air all night."
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In short, keeping a fan on through the night won't kill you - but if the cons outweigh the pros maybe upgrade your system or find a new way to keep cool at night.
Daisy Phillipson