Children with body temperature over 37.4℃ is defined as fever. fever is divided into 3 grades: 1. low fever, defined as low fever during body temperature 37.4-38.1℃. 2. moderate fever, defined as moderate fever during body temperature 38.1-39.1℃. 3. high fever, defined as high fever during body temperature greater than or equal to 39.1℃. According to the child’s temperature and the actual clinical performance, the specific way to reduce fever is different. When the body temperature is in a low fever state, the child’s overall good mental state, only with physical cooling can be. Physical cooling refers to drinking more water and wiping with warm water. When the body temperature is moderately hot or high, especially if the body temperature is greater than or equal to 38.5℃, oral antipyretic drugs can be given for treatment, and physical cooling is also needed. If the child’s fever does not subside after taking oral antipyretic medication, parents should actively take the child to the hospital for detailed examination and further treatment.