High fever after vaccination refers to the fever after vaccination, the body temperature is greater than 39 degrees Celsius, can be treated by physical cooling, taking medication, the specific treatment varies according to the condition. Fever after vaccination if the temperature is lower than 38.5 degrees and the patient’s spirit is good, you can use physical means of cooling treatment, such as the use of warm towels or alcohol to wipe the body, at this time, drink more warm water can also improve the symptoms of fever. If the body temperature is higher than 38.5 degrees after vaccination and continues to worsen, you should take antipyretic drugs such as ibuprofen and acetaminophen under the guidance of a doctor, and you can also use physical cooling treatment at the same time. High fever refers to a body temperature of more than 39 degrees Celsius, this situation should be promptly under the guidance of a physician to take antipyretic drugs to reduce fever, can also be supplemented with physical cooling, if the recurrence of high fever for more than 24 hours, or infants with poor mental health, urinary symptoms suggesting an aggravation of the condition need to be promptly consulted, do not delay. Usually the symptoms of fever after vaccination will not last more than 24 hours. If the fever lasts more than 24 hours, the patient should consult a doctor for treatment under the guidance of the doctor, and should not take any medication without authorization in order to avoid delaying the condition.