资料与图片来源：雅虎新加坡 原标题：Is sleeping with a fan on bad for your health? In the sweltering heat, sleeping without the relief of a fan can be near impossible - but the reprieve isn’t without its risks.For most people, sleeping with a fan whirring overnight only brings positive results, but for those who suffer from allergies or asthma, the negative side effects can be a deterrent. According to Sleep Advisor, as fans circulate the air, they can move around dust particles and other potential allergens that can cause irritation.The American Academy of Allergy, Asthma and Immunology says that dust mites are the most common allergy triggers - and given they can cling to ceiling or other fans, it's clear to see how an attempt to circulate air in the summer can be an allergy trigger. The risk is real but minor, according to New York City allergist and author of the book "The New Allergy Solution," Dr Clifford Bassett. Dr Bassett told The Independent: “A ceiling fan can create air currents that help to circulate indoor air particles, including pollutants and some allergens. “For many of us, it doesn’t really appear to pose an issue. If you experience sneezing or worsening nasal symptoms, and you have indoor allergies, due to air forcefully blowing up your nasal passages causing sneezing, which is actually a protective mechanism, it can be annoying and perhaps cause a flare-up in your nasal allergies.”To minimise the risk of possible allergy flare-ups, cleaning the fan blades can be helpful.Apart from the potential for allergy or asthma reactions, fan-users should also be aware of muscle cramps and dry skin that can come from fan usage.Although lotions can help with dry skin caused by a fan - a minor inconvenience in comparison to restless sleep - stiff muscles may be unavoidable. The result of concentrated cool air, Sleep Advisor warns that muscles may tense up or feel sore the morning after a restful breezy sleep. However, there are no significant risks associated with fan use - so as long as you are comfortable, it is okay to keep the fan blowing throughout the night.Or, you can try other tricks for keeping cool at night such as closing the curtains during the day or sleeping in a cool, damp T-shirt.

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