A healthcare professional has urged caution for anyone who falls asleep with a fan running, warning it could be negatively affecting your health.
With May underway and warmer nights on the horizon, it’s easy to see why many people reach for a fan when temperatures climb.
Trying to get decent rest in a stifling bedroom—especially when you’ve got work the next morning—can feel impossible without some kind of airflow.
But while switching on a fan might seem like a harmless solution, sleep specialists say there are a few drawbacks worth considering before making it a nightly habit.
Dr. Kiran Dintyala told the health site that a fan can blow around dust and pollen particles, which can irritate those with allergies and asthma.
He also warned that constant airflow may dry out the air around you, potentially contributing to issues such as bronchitis, sinusitis, nosebleeds, and dehydration.
Dry, irritated eyes can be another problem, and Dr. Dintyala noted that people who sleep with their mouth open may be more likely to wake up with a sore throat.
Sleep expert Martin Seeley, CEO of Mattress Next Day, has also previously shared reasons why it may be better to avoid leaving a fan on overnight—even during the muggiest part of summer.
“So, if you find that you are suffering from excessive sneezing, watery eyes, a runny nose, itchy throats and even breathing difficulties make sure that there is no dust on the blades of your electric fan,” he added.
Seeley explained that prolonged exposure to moving air can dry out nasal passages, which may cause the body to produce more mucus in response.
That can bring on uncomfortable effects like a headache, a blocked nose, or even sinus pain—though he suggested that drinking plenty of water after waking may help reduce the impact.
“This is also recommended for those that have suffered from a poor night’s sleep due to the heat, as even mild dehydration can cause you to feel even more drowsy and tired,” Seeley added.
Another concern is muscle stiffness. Seeley advised that if you already have aches—whether from exercise or spending long hours at a desk—you may want to avoid aiming a fan at the sore area throughout the night.
“If you have any pre-existing muscle pains, perhaps from working out or from improper posture whilst working at a desk, you should refrain from directing the electric fan on this area throughout the night.”