The main symptom is localized pain during breastfeeding, because milk is the best culture medium for bacteria, and secondary infection can easily occur after the accumulation of milk, which is accompanied by significant fever, increased local skin temperature, breast swelling and pain, and even purulent nipples or purulent blood. The milk may be purulent or purulent, and anti-infective treatment should be actively administered. The most common type is Staphylococcus aureus, which can be treated with broad-spectrum sodium penicillin or cephalosporin. Usually, after effective treatment, the patient’s symptoms can gradually improve, and attention should be paid to prevent the occurrence of breast abscesses.