If a child has fever after taking hepatitis B vaccine, the specific treatment is as follows: 1, if the body temperature does not reach 38.5 ℃, belongs to the low fever, this situation is a normal side effect of vaccination, do not need to take oral antipyretic drugs, can be given to the physical cooling, can be applied to antipyretic stickers on the forehead, neck, limbs, and other parts of the antipyretic, or give the child to drink as much water as possible, and repeatedly drink more warm water is conducive to You can also apply repeatedly to the pediatric limbs, neck, and armpits to wipe the way to reduce fever, when wiping with water, be sure not to wipe to the child’s vaccination site, to avoid infection. Older children can run and jump through the activities, while drinking more water to reduce fever. 2, if the child’s temperature is greater than 38.5 ℃, need to take the child to the hospital under the guidance of the doctor for further medication, to avoid indiscriminate use of medication at home for the vaccine play a bad role, affecting the effectiveness of the vaccine.