Adults who have fever after vaccination need to pay close attention to the mental reaction, and can be treated with general treatment, medication and other methods. 1. General treatment: reduce clothing appropriately, use warm water to wipe in the armpits or groin and other large blood vessels to achieve cooling effect, and at the same time, you can drink more water appropriately. 2. Medication: If the temperature exceeds 38.5℃, oral antipyretics such as ibuprofen can be given. If repeated fever still occurs, it is recommended to improve the blood routine, calcitoninogen and other tests to determine whether there is a bacterial infection. If there is a bacterial infection, antibiotic treatment can be given, such as cefuroxime, amoxicillin, medication should be taken under the guidance of a physician, do not self-medication. If fever occurs in adults after vaccination, if it is lower than 38.5℃, it will usually be relieved in about three days after taking the above measures. If it continues to be unrelieved or if the temperature is high, it is recommended to consult a doctor for further clarification of the cause of the disease and then actively cooperate with the treatment.