Breast reduction surgery works by surgically removing excess fat and other components from the breasts to reduce the size of the breasts. The hazards may include the occurrence of postoperative infection, hematoma, and areola necrosis. Breast reduction surgery is performed by making an incision on the surface of the breast or at the areola, or in some patients, from the lower breast crease, or from the nipple to the lower crease, to remove fat or part of the connective tissue to reduce the size of the breasts. If the sterilization is not thorough enough during the operation, it will lead to the phenomenon of postoperative infection, at this time, we should go to the hospital in time to eliminate the infection, so as to avoid more serious consequences. If more glands than planned are removed during the operation, coupled with the lack of thorough hemostasis, it can lead to the problem of hematoma after the operation. If the surgeon’s technique is not fine enough, the undesirable phenomenon of areola necrosis can also occur. Breast reduction surgery is not recommended for those whose enlarged breasts have no serious impact on their lives. If breast reduction surgery is necessary due to discomfort in the breasts, it is recommended that the patient carefully choose a hospital and find an experienced surgeon to perform the operation in order to avoid undesirable situations.