Mosquito liquid harmful or not with the use of qualified products purchased through formal channels, the correct use of more harmless, if the use of low-quality mosquito liquid may have a toxic effect on human beings. Qualified mosquito liquid purchased through formal channels, the most common is to contain pyrethroid ingredients, the ingredients belong to the high efficiency and low toxicity of pesticides, which is a harmful substance to humans. However, the content of pyrethroids in mosquito liquid is very small, and short-term use of the human body has a small impact, and generally will not produce too much harm to the organism. But if the long-term use of high content of toxic substances of poor quality mosquito liquid may be harmful to the body, easy to lead to the body poisoning. It is recommended that mosquito liquid can be used occasionally, and should not be inhaled for a long time in large quantities. In addition, the use of anti-mosquito liquid, need to be placed in a position away from the human body, but also need to maintain indoor ventilation. In addition, to choose a low-toxicity mosquito liquid, from the regular channels to buy, to avoid choosing to the poor quality of the mosquito liquid.