Scientists say using a fan to help us sleep is bad for us. This is bad news in the current hot weather. Sleep experts say there are many reasons why using a fan is bad for our health. They cause problems for people with asthma. Dust and pollen circulates around the room and adds to sleeplessness. Circulating air can dry out and irritate our eyes and mouth. This makes it difficult to sleep. Fans also cool the air and can make our muscles tense.
Many sleep experts say fans are not a danger to health. One said: "There's nothing about a fan that's toxic. There's nothing wrong with circulating air." If a fan stops us sweating, we will sleep. People should keep fans at a distance from their bed and not have them blowing at their body. Using an air filter in the bedroom can reduce the levels of dust. A fan may be better than an air conditioner. This can cool the sweat on our body and give us a cold.