General mosquito coils used inside the polyester drugs, after ignition is mainly for mosquitoes produce some toxicity of the nerves, so that mosquitoes appear paralyzed, can not fly or can not move appear. But this kind of insecticidal polyester only to kill the role of insects, no harm to the human body, has been through many years of clinical research, including laboratory data. Therefore, do not worry too much, after the night point mosquito coils will not cause harm to the body, certainly no particular harm. So, just use the right mosquito coils. In addition, you can use liquid mosquito coils, convenient, neat, no ash, the stimulation will be smaller.