Mothers with hepatitis B can breastfeed. Newborns born to mothers with hepatitis B can receive breast milk from mothers with hepatitis B if they have received hepatitis B vaccine and hepatitis B immunoglobulin within two hours after birth. In addition, we should also pay attention to two situations, if the mother of hepatitis B is taking oral tenofovir, one situation is the oral tenofovir antiviral treatment for treatment purposes, the child can not stop oral tenofovir after birth, this time can not be breastfeeding, because the drug can pass through the breast milk, and tenofovir is kidney damage. The other situation is that the mother of hepatitis B is taking oral tenofovir for the purpose of mother-to-child blockade and stopping the drug immediately after the birth of her child, and she can breastfeed her child at this time.