Breastfeeding is a process that is not completed at once, so the amount of milk should be gradually reduced, and it does not disappear immediately. After a woman has finished breastfeeding, she should promptly use medication or physical methods to promote milk return, such as using milk return or raw malt to promote the contraction of the mammary glands and reduce milk secretion. In addition, if the amount of milk is large, it can also be discharged in small amounts daily to prevent the accumulation of milk and the formation of mastitis. It takes 1-2 weeks from the time you stop breastfeeding until the milk disappears. If you stop breastfeeding suddenly and do not promote milk discharge, it is easy to form lumps in the breast.