Breastfeeding in the right way is not harmful to a woman, but breastfeeding in the wrong way, not paying attention to breast hygiene and sanitation may cause breast sagging, mastitis and so on. Breastfeeding the right way, there will be no harm to a woman’s body. Postpartum breastfeeding is beneficial to women as it promotes uterine contraction and helps the uterus to recover, and it can also reduce the occurrence of breast diseases such as breast cancer. Breastfeeding in an incorrect way, breastfeeding in an incorrect way, such as the baby to eat partial milk, let the child to play with the nipple or sleep, etc., these situations may cause breast sagging. Not paying attention to breast cleaning and hygiene during breastfeeding, invasion of pathogenic bacteria may cause mastitis, with symptoms of redness, swelling and pain in the breasts, accompanied by fever and other discomforts in some patients, which can also be harmful. After giving birth, women are advised to breastfeed in the right way, which is usually not harmful to women.