Babies will sweat when they have a fever, especially after crying or applying antipyretics and drinking hot water, and the evaporation of sweat will take away a certain amount of body heat so as to achieve a certain degree of antipyretic effect, so it is necessary to monitor the temperature in time to observe the changes in the body temperature after sweating. In addition, we should pay attention to the appropriate amount of water to replenish water, because a large amount of sweat loss may occur after hypertonic dehydration, when dehydration is serious body temperature is not easy to fall. After antipyretic and symptomatic treatment, it is necessary to go to the hospital in a timely manner in order to clarify the cause of fever and then give the appropriate etiological treatment.