Many people cannot sleep without using a , but scientists say this could be for us. This is unwelcome news for those of us struggling to nod off during the scorching hot weather. According to sleep experts at the website Sleep Advisor, there are many why the use of a fan could be detrimental to our . Fans can cause problems for people with asthma or fever. The rotating blades of fans cause dust and to circulate around the room and add to an asthmatic's . Sleep Advisor says circulating air can dry out and irritate your eyes, and sinuses, which also makes it difficult to sleep. Fans also cool the air and can make tense up and cramp.
Other sleep disagree and say there are no dangers to health from using a fan. Dr Len Horovitz, a on the health of the respiratory , said: "There's nothing about a fan that's . There's nothing wrong with circulating air." He told the Live Science website that if a fan stops us sweating, it will help us to sleep. He said people should keep fans at a safe from their bed and not have them blowing at their body. He also recommended keeping an air filter in the to reduce the of dust in the room. Sleeping with a fan may be preferable to using an air , which can chill any sweat on our body and cause us to wake up with a cold.