Breast “milk box” is a folk saying, considered to be caused by milk stagnation, especially after breastfeeding, in the process of quitting breastfeeding, it is easy to lead to local residual tissue, the formation of inflammatory lumps. The patient will also be able to palpate the localized lesion, and even in some patients, there will be obvious symptoms of pain, which should be treated systematically. Including the choice of local hot compresses, massage, can promote the subsidence of the mass. In addition, some patients are also prone to secondary infection, in the distant stage will form mastitis, if necessary, need surgical drainage. If the inflammatory lump does not improve, the inflammatory lump can also be removed under local anesthesia, with regular dressing changes. It is a pathological manifestation, so it is not normal, and usually requires regular breast ultrasound examination.