After the hepatitis B vaccination, it is best to abstain from eating for about a week. If the baby is breastfed, the mother must abstain from eating stimulating foods, especially spicy, stimulating, and overly oily foods, because breast milk has an effect on the child, and if not abstained, it will affect the preventive effect of the vaccine. After the hepatitis B vaccination, normal adults should also avoid eating cold, spicy, and stimulating foods, as well as overly greasy and fried foods, and eat more fresh fruits and vegetables to replenish vitamins, avoid drinking alcohol, and do not smoke. The injection site must not be exposed to water, and remember not to move the injection site too much.