General air fresheners have certain harmful effects on human body. The main components of common air fresheners are ether, aromatic compounds and deionized water, which have no actual purifying effect on the air and can only play the effect of covering up the original smell, not improving the air quality. Moreover, aromatic compounds and other impurities in air fresheners can also pollute the air and may induce allergies, central nervous system symptoms and other uncomfortable reactions. 1.Allergy: air fresheners have different ingredients, so a large amount or long-term use may cause allergic reactions to human skin mucosa, rashes, itchy skin and other phenomena; 2.Stimulation of respiratory tract: air fresheners have different ingredients and flavors, which have a negative impact on respiratory tract. and taste, for the respiratory tract have certain stimulation, inhalation concentration is too high, may produce respiratory discomfort, have allergic rhinitis, allergic pharyngitis, allergic asthma and other people, should try to avoid using air fresheners; 3, neurotoxicity: aromatic compounds containing benzene ring volatile in the air, can have an inhibitory effect on the nerves, long-term inhalation of air fresheners, the lighter may appear dizziness, nausea Long-term inhalation of air fresheners may cause dizziness, nausea and other adverse reactions, and in severe cases, it may also lead to reduced consciousness, convulsions or even coma and other adverse consequences; 4, other toxicity: some of the thick-ringed aromatic hydrocarbons in poor-quality air fresheners also have a certain risk of cancer. In addition, pregnant women and young children should also try to avoid inhaling too much air freshener to avoid adverse effects on fetal or early childhood development. If you want to keep the air fresh, you can choose to open the windows for ventilation or choose regular manufacturers’ air purifiers for improvement.