We all know that breast milk is the best natural food for babies, it provides many immune factors, hormones, enzymes and active peptides that are not found in other baby foods, providing nutrition to babies, promoting growth and intellectual development, promoting the development of gums and teeth, immune antibacterial, anti-allergy, improving the relationship between mother and child, contributing to the prevention of chronic diseases such as obesity and hypertension, reducing postpartum bleeding in mothers, promoting uterine rejuvenation, reducing Ovarian cancer and uterine cancer risk, etc., both economical and affordable. Can every mother feed her baby with her own breast milk? Of course not. Most mothers can breastfeed. However, some mothers are unsuitable for breastfeeding for various reasons, such as the following: 1. children with suspected or confirmed galactosemia. 2. mothers with active tuberculosis. 2. Mothers with active tuberculosis or human immunodeficiency virus (HIV) infection. 3. The mother is receiving isotope radiotherapy or has been exposed to radioactive material (breast milk containing radioactive material). 4. The mother is receiving antimetabolic drugs or drugs that can be secreted through breast milk, and other chemotherapeutic drugs (until complete clearance). 5. The mother is using drugs or alcohol. 6. HSV infection in the breast (the other side is free of infection and can continue feeding). 7.There is still controversy about whether a mother or infant with cytomegalovirus (CMV) infection can breastfeed. Most scholars believe that for infants with confirmed or highly suspected CMV infection, it is recommended to stop breastfeeding if CMV excretion is detected in breast milk. Some scholars also suggest that for asymptomatic full-term infants, breastfeeding can be continued, but for premature and low birth weight infants need to be particularly careful, when the mother has obvious evidence of CMV infection, should not breastfeed, or breast milk should be specially processed (-20 ℃ frozen for more than 24 hours, then pasteurization method, heating 62.5 ℃ for about 30 seconds), so as not to cause infection in infants. 8, hepatitis B surface antigen (HBsAg) positive mothers, newborns born after formal prevention (injection of hepatitis B highly effective immunoglobulin within 12 hours after birth, and vaccination against hepatitis B as required), or breastfeeding can be.