The pain of the bones in the middle of the two breasts is usually caused by the following common reasons: a. Breast malignant tumor with metastasis to the sternum, which will cause pain in the bones in the middle of the breast at this time. Patients can improve the mammogram or magnetic resonance examination of the breast to clarify the nature of the lesion, and then perform modified radical treatment of breast cancer plus lymph node dissection as soon as possible. After surgery, local radiotherapy and systemic chemotherapy can be combined to kill the cancer cells in the body as much as possible and prolong the life of the patient. Fracture of the sternum can be caused by inadvertent fall. At this time, the patient will have difficulty in breathing and limited activities, so the X-ray or CT examination of the sternum can be improved. After the nature of the fracture is clearly defined, internal fixation should be performed as soon as possible to restore the continuity of the sternum. Symptomatic and analgesic treatment can improve the painful symptoms of the sternum.