Mastitis refers to an acute purulent infection of the mammary glands, which is common in women who are breastfeeding 3-4 weeks after delivery and can recover in about a week or a month, but the exact time is also related to its severity, treatment method and time of treatment. Early or mild acute mastitis can be recovered in about 1 week if the infection is treated promptly. However, if it is poorly controlled or continues to progress and forms an abscess, the treatment time will be extended. Patients need to undergo an incision of the breast abscess, drainage of the incision site if necessary, and regular incision changes, which may last for about 1 month or even longer. In addition, the patient should stop breastfeeding on the sick side of the breast and suck out the milk regularly with a breast pump. To prevent the occurrence of acute mastitis, patients should avoid milk stagnation and prevent nipple damage; keep the breasts clean and develop habits such as regular breastfeeding and babies not sleeping with nipples.