Infants and young children are allowed to turn on the air conditioner when they are sleeping, but try to avoid the airflow blowing directly onto the child. If you apply air-conditioning to your child, the temperature should preferably be controlled at around 25-26°C. Parents can adjust the temperature according to their child’s reaction. If the child sweats profusely at the slightest movement, it means that the room temperature is on the high side and the temperature can be adjusted down appropriately. If you feel that the child’s neck and back are a little cold, it is possible that the room temperature is on the low side, and you can adjust the temperature up appropriately. It is also important to clean the air conditioner’s filter regularly to prevent dust, dirt or bacteria from affecting your child. If your child has dry skin or nosebleeds after using the air conditioner, drink plenty of warm water or use a humidifier to increase the humidity in the room. In addition, it is recommended to open the windows every 6-8 hours to maintain proper air circulation. In this way, children can safely use the air conditioner and sleep in an air-conditioned room.