The practice of adding disinfectant to a humidifier is highly undesirable. Humidifiers work by atomizing water and releasing it into the air, thus increasing humidity. The atomized water is more likely to be inhaled into the respiratory tract, if which added disinfectant, will drift in the air with the water mist, increasing the concentration, will also be inhaled into the body, causing irritation to the respiratory tract, may also irritate the eye mucosa, causing discomfort, especially for the elderly and children is more harmful. 1, stimulate the respiratory tract: the main components of disinfectants include sodium hypochlorite, quaternary ammonium salts, p-chloro-m-xylene phenol, etc.. No matter which component, the concentration is too high, the inhalation of the respiratory tract may stimulate the trachea, causing coughing, breathing problems, etc. Long-term in this environment may cause bronchitis, pneumonia, bronchial asthma and other respiratory diseases; 2, stimulate the eye mucosa: As the humidifier continues to release the disinfectant into the air, the concentration increases will also stimulate the eye mucosa, redness, swelling, tears and other conditions. Tears, etc., and in serious cases may lead to blurred vision. If the above situation occurs after inadvertent use, you should promptly stop using the humidifier, and open the window to ventilate. If the situation does not improve, it is recommended to seek medical attention for treatment. In addition, the use of humidifiers should be avoided at the head of the bed, it is best to clean the humidifier once a week, the process of humidification is best to use pure water, the residual water should be poured away every day, if temporarily not used, can be cleaned and dried to save.