As UK households face increasingly hot nights—and with only about 5% equipped with air conditioning—many are relying on electric fans to stay cool. But health expert Dr. Naheed Ali warns that using a fan overnight can come with hidden health risks.
One of the most common issues is dryness. Constant airflow can dry out your throat and sinuses, leading to thicker mucus, congestion, a scratchy voice, or persistent coughing throughout the day.
Another concern is allergies or asthma. Fans circulate dust, dander, pollen, and lint—particles that can trigger sneezing, wheezing, or a tight chest, especially for those with respiratory sensitivities.
Muscle stiffness is also possible. A direct stream of cold air may cause muscles in your neck and shoulders to tighten while you sleep, leaving you sore in the morning.