As temperatures rise, many people rely on fans to stay cool during sleep. However, health experts caution that this common practice may pose risks, particularly for those with specific health conditions. Dr. Kiran Dintyala notes that fans can circulate dust and pollen, which can irritate individuals with allergies or asthma, leading to symptoms like sneezing and breathing difficulties. Furthermore, fans can dry out the air, causing throat and sinus issues, especially for those who sleep with their mouths open, potentially resulting in sore throats and dehydration. Continuous airflow may also trigger mucus production, leading to congestion and headaches. Additionally, some individuals experience muscle stiffness from prolonged exposure to directed airflow, while the noise generated by fans can disrupt sleep cycles, preventing restful sleep. While fans are generally safe for most, those with allergies, sensitive airways, or sleep disturbances should take precautions, such as regular cleaning and adjusting fan direction. Ultimately, the impact of sleeping with a fan varies by individual, and awareness of these potential issues can lead to better sleep quality.