Mastitis is a common disease in women and can be divided into acute purulent mastitis, parareolar fistula, plasmacytic mastitis, etc. depending on the cause, the most common of which is acute purulent mastitis is stated here. Acute septic mastitis often occurs during lactation, especially within 1 to 2 months after delivery, so it is also called acute lactation or puerperal septic mastitis, which is called “canker sore” in Chinese medicine. The incidence of acute mastitis in primiparous women is as high as 2% to 4%, which is one times more than mastitis in menstruating women. The actual fact is that you can find a lot of people who are not able to get a lot of money for the actual money. 3.Treatment: Local hot compresses can be applied in the early stage of the disease. If there is no redness, swelling, heat, pain and chills, fever, antibiotics can be dispensed with. If there are chills, fever and other systemic symptoms, you can apply penicillin intravenously, which can sterilize and does not affect breastfeeding. If you are allergic to penicillin, you can use erythromycin type drugs. 4, prevention: adhere to breastfeeding, adhere to the principle of “breastfeeding on demand”, where the “demand” includes the child, but also the mother; usually pay attention to avoid milk stagnation, try to let the child eat empty milk once before eating the other side of the milk, the remaining milk should be squeezed out or sucked out with a breast pump. The remaining milk should be squeezed out or sucked out with a breast pump, because milk is a good medium for bacteria to breed in it. Also, if you have nipple depression, try to correct it before you get pregnant because our breast lobules are like the grapes that we see, and if you have a nipple depression or a duct that is not open, you are prone to milk stasis.