During breastfeeding, the manifestation of chest pain, or breast pain, is very common. It is considered to be caused by milk stagnation, which is most common in first-time mothers, inexperience in breastfeeding, rupture of the nipple, and possible secondary infections. It is necessary to go to the hospital in time for a careful examination by a specialized doctor. If mastitis occurs during breastfeeding, it will be manifested by obvious increase in breast skin temperature, breast distension and pain, even with fever, and it is necessary to stop breastfeeding if necessary, and it is even necessary to cooperate with anti-anti-infective treatment, which can be given orally or intravenously according to the needs of the disease, and the commonly used medicines are β-lactam antimicrobials. During the treatment period, we should pay attention to the observation of local symptoms and signs of change, there are many patients after timely and effective treatment, the patient’s chest pain symptoms can gradually improve and reduce.