In normal cases, lactation is not necessary. However, if there are symptoms such as low milk production, breast swelling and pain, then lactation is necessary. Lactation is the use of localized breast massage to promote milk secretion or to relieve discomfort such as breast swelling and pain. If a postpartum woman’s milk secretion is normal and her breasts are not obviously swollen and painful, there is no need for lactation. If a postpartum woman’s milk secretion is low and accompanied by significant swelling and pain, it is considered that there is a blockage of the milk ducts, and it is recommended to take lactation treatment. Breast pumping can remove the milk from the ducts and prevent the milk from accumulating and causing breast lumps, acute mastitis and other diseases. The action must be gentle, the technique must be correct, it is recommended that qualified professional lactation consultant to operate. Non-professionals may cause rupture of the milk ducts and affect the health of the mammary glands. In conclusion, whether it is necessary for a mother to pass breast milk, need to decide according to their own situation, can not be generalized.