Acute mastitis is a common type of breast infection in breastfeeding women, which is mostly combined with milk stagnation. It is important to actively empty the milk and give intravenous penicillin or cephalosporin anti-infection treatment, and to keep the nipples clean by washing them in a timely manner before and after breastfeeding. Once the breast becomes red and swollen with severe pain, and fluctuating lumps can be palpated in the breast, it often indicates the formation of a breast abscess, which needs to be treated by surgery at a regular hospital in breast surgery or general surgery, which is mostly an incision and drainage of breast abscess. Therefore, during breastfeeding, you should develop good breastfeeding posture and breastfeeding habits, empty the milk in time, and seek medical attention when breast pain occurs, avoiding blind medication to avoid aggravating the condition and serious clinical complications such as acute mastitis.