Humidifiers may have an effect on infants, making them susceptible to respiratory infections and other conditions. Due to the young age of infants, all organs of the body are not well developed. If the humidifier is turned on for a long time or the humidity in the air is too high, it may lead to adverse reactions in the mucous membranes of the respiratory system and induce respiratory infections such as bronchitis. Therefore, it is necessary to monitor the humidity situation at all times, and also pay attention to regular cleaning of the humidifier. Humidifiers can effectively improve indoor dryness and prevent coughing or phlegm. Appropriate use of humidifiers can be beneficial to infants. However, excessive use can easily breed bacteria, mold and other pathogenic microorganisms. Bacteria and mold may enter the infant’s respiratory tract with the steam and cause respiratory infections in infants. It is recommended to create a good sleeping environment for infants and open the windows more often for fresh air. It is also necessary to disinfect the floor regularly to keep the area clean.