The symptoms of fever after the vaccination of young children can be based on the severity of fever symptoms to determine the treatment measures, if the temperature of young children in the 38 ℃ or less is a normal adverse reaction to the vaccine, the child does not have obvious symptoms can not be treated, but need to let the child drink more warm water, but also to closely observe the child’s symptoms, the fever caused by the vaccination in about 2-3 days time The fever caused by immunization will drop automatically in about 2-3 days. If the child’s temperature is above 38.5℃ after immunization, you can take ibuprofen granules to lower the temperature and relieve the discomfort caused by fever. If the child’s temperature remains above 38.5℃, the fever may be caused by a disease, and the child needs to go to the hospital for treatment under the guidance of a doctor.