Newborns with breast lumps need to be targeted according to the cause of the treatment, you can choose to observe, medication, surgical treatment, etc., the specific need to follow the doctor’s instructions. 1. Observation: Newborns may have hard lumps in their breasts due to the effect of estrogen in the mother’s body, which has not been metabolized for the time being, shortly after birth. Generally, as the newborn gets older, it will disappear on its own. 2. Medication: If the newborn’s hormone level is disturbed and there is precocious maturity, then it is necessary to consult a doctor in time and choose medication to treat the symptoms. 3. Surgery: If the newborn baby has breast tumor, it will also lead to hard lumps in the breast, which need to be examined by pathology in time, and need surgery if necessary. Therefore, if you find any abnormalities in newborns, we recommend that you consult a doctor in time, under the guidance of the doctor in order to clarify the specific causes of the disease, and give targeted treatment.