Short-term normal use of electric mosquito liquid is usually not harmful to the human body, but long-term incorrect use may cause breathing difficulties, shock and other serious harm. Electric mosquito liquid is mainly after heating, the pyrethroid components volatilized into the air, so that mosquitoes and other insects excessive nerve excitation to achieve the effect of mosquito repellent. General regular electric mosquito liquid will be safety testing, the volatile components will be within the safety range. So short-term normal use of electric mosquito liquid is not harmful to the human body. But the incorrect use will be harmful to the human body, such as indoor air circulation, long-term closed space, pyrethroids will stimulate the mucous membranes to cause coughing, throat tingling, allergic patients will be exposed to sneezing, wheezing, respiratory distress and other symptoms, severe can also cause swelling of the mouth, throat mucosa or anaphylactic shock. Therefore, such products should be used correctly and seek medical attention when symptoms are found to avoid harm to the body.