After the hepatitis B vaccination, patients are advised to arrange a reasonable bathing time according to the reaction of the vaccinated person. If patients have no obvious uncomfortable reactions after vaccination, they can usually take a bath after 24 hours. If there are uncomfortable symptoms, such as fever and rash, it is recommended to wait until the symptoms disappear before bathing, which usually takes 3-4 days. Generally speaking, small local wounds will be left after the hepatitis B vaccination injection, and bathing within a short period of time may increase the risk of infection. Usually the wound will gradually heal after a day, and the risk of infection will be greatly reduced. In addition, it should be noted that many patients may also have adverse reactions such as fever, rash, redness and swelling after vaccination, and should not take a shower on the same day as this may aggravate the local symptoms. Most of these adverse reactions can disappear after 3-5 days. In addition, patients should follow the doctor’s advice after vaccination, pay attention to protecting the wound, take rest, and avoid eating spicy and stimulating foods.