Fever after vaccination against hepatitis A, to replenish more water, physical cooling, if the temperature exceeds 38.5 ℃, should go to the hospital, clear the cause of fever, under the guidance of the doctor to be dealt with. Fever after vaccination against hepatitis A, may be a common adverse reaction after vaccination, generally to physical cooling, drink more warm water to promote excretion, at the same time, you can use warm water to wipe the body, you can also use antipyretic paste, ice packs to lower the temperature treatment, most of the gradual alleviation of 2 ~ 3 days. If the body temperature exceeds 38.5 degrees, you can consider using medication to reduce fever under the guidance of a doctor, commonly used antipyretic drugs include ibuprofen, acetaminophen and so on. If the body temperature continues to appear high fever, we should go to the hospital as soon as possible to avoid causing related complications, and at the same time, we should pay attention to exclude bacterial and viral infections and other causes of fever, improve the relevant examination, and under the guidance of the doctor symptomatic treatment.