The condition of milk distention during the weaning period may be due to partial retention of milk as well as hyperplasia of the mammary glands. This is because the weaning period is still stimulated by lactogen, which leads to hyperplasia of the mammary glands, especially of the ducts and follicles, and a small amount of milk is produced during this period. Therefore, during this period, the patient should first take the appropriate medication orally to bring the patient to the level of milk return. It is also important to empty the breasts of any remaining milk to prevent milk retention. Once milk retention occurs, the patient should be able to give massage as well as suction to empty the mammary glands to prevent infection. Because lactational mastitis in the clinical treatment course is relatively long, but also more serious damage to the patient, you should try to prevent the occurrence of this disease, once it occurs should be given early anti-infection and topical medication external treatment.