It is best not to take any medicines by mouth for 3 days after your child has received the hepatitis B vaccine. After hepatitis B vaccination, your child may have localized redness and swelling at the vaccination site, or a slight tingling sensation. At the same time there will be fever symptoms, usually low fever, body temperature is usually not more than 38 ℃, do not need to be treated with drugs, can be self-reduction of fever, can be improved in about 3 days. Usually can be given more water, drink water frequently and other physical cooling methods to reduce fever, but also can be used to reduce fever with warm hot water constantly rubbing method. But because the hot water wipe do not touch the site of hepatitis B vaccination, to avoid local infection. Some children may have digestive reactions, such as nausea, vomiting, diarrhea, can also control the child’s symptoms through dietary adjustments, can disappear in about 3 days, try not to adjust the way through the use of oral medication, to avoid affecting the effect of hepatitis B vaccine.