Breastfeeding injections are given in the buttocks, which is an intramuscular injection. The injections are all estrogenic drugs, which play a role in returning breast milk by inhibiting the secretion of lactogen. Women need a week before their breasts do not rise and hurt during the injection, and they should also drink less soup during the injection period. They can also take fried malt, high doses of vitamin B6 which also has a certain auxiliary effect, or give external application of mannitol breast, which can play a role in reducing the occurrence of milk secretion and breast swelling and pain. When the swelling and pain of the breast is more obvious on the 3rd-4th day of breastfeeding, you can also use a breast pump to suck up the milk first, and keep the underwear of the breast loose to avoid being squeezed and bumped, so as not to lead to the occurrence of mastitis.