Fever after vaccination belongs to the normal reaction of vaccine, and the treatment is chosen according to the specific temperature value. When the temperature is between 37-38.5℃, no treatment is needed for the time being, feed the child more water, pay attention to rest, keep observing the change of temperature or the change of condition, if the child’s mental state is not good, you can take pediatric Chai Gui fever-reducing granules. If the temperature is 38.5℃, you need to take ibuprofen suspension or acetaminophen suspension. If fever occurs within 3 days after vaccination, it is a normal reaction to the vaccine and does not require special treatment. If a fever occurs 3 days after vaccination, further testing should be done to rule out a vaccine-induced fever. Vaccination should be done when you are in good health. If you are sick or have taken medication, vaccination should be delayed.