Surgical treatment is an important part of breast cancer treatment, but it is not the whole treatment. The cure of cancer not only requires the use of surgery, chemotherapy and radiotherapy by professional doctors, but also depends on the patient’s attention and vigilance to the disease. Follow up is not to be worried or frightened, but to monitor the progress of the disease with a very positive and healthy attitude to monitor, find and solve the problems. Through scientific and reasonable follow-up, early detection of ipsilateral recurrence and contralateral breast cancer can be achieved. Breast cancer patients are not only at risk of chest wall recurrence on the side of surgery, but the incidence of contralateral breast cancer is also much higher than that of healthy women. Most chest wall and breast lumps can be detected by your own physical examination, but still need to be examined by a doctor and diagnosed by instruments. The follow-up process is a process to consolidate the treatment and moreover to monitor the recurrence, distant metastasis and second cancer (distant metastasis refers to cancer cells metastasizing to distant organs such as bone, liver, lung and lymph nodes and proliferating malignantly. Regular follow-up and whole-body examination are especially important. Second cancer is the occurrence of other new cancers. This may be related to the patient himself or to factors such as radiotherapy. Although the chance of occurrence is not very high, it is still important to be alert for early detection, necessary examination and timely treatment). Follow-up time: The starting time is the month of surgery, followed by every three months during the first year after surgery, every six months during the second and third years, and then every year for the rest of life. Follow-up clinic: In order to ensure the integrity of the follow-up data, patients (including foreign patients) are required to visit the breast specialist clinic during the follow-up time. If there are no special circumstances, patients are recommended to come to the clinic by themselves and should be accompanied by a family member during the visit. The contents of the follow-up visit include: healing of the surgical wound, functional exercise; implementation of postoperative chemotherapy, radiotherapy and other adjuvant treatments, adverse reactions; check for recurrence or metastases and timely adjustment of treatment ideas; examination of the contralateral breast; assessment of the efficacy of new drugs and programs, etc. Usually the follow-up consultation includes the following: 1. Physical examination: the doctor conducts physical examination, mainly examining the affected and contralateral breast, the resection site and surrounding skin, assessing the upper arm lymphedema, examining the spine, sternum, hypochondrium, pelvis for pressure pain, other routine chest and abdominal examination and neurological examination. 2. Laboratory examination: checking routine blood, liver and kidney function, blood tumor index. 3. Imaging examination chest film (or CT). Abdominal ultrasound (or CT), bone scan. If bone pain occurs or bone scan finds abnormal weight-bearing bone, bone X-ray is required. PET examination can also be considered for those with good economic conditions.4. Mammography For breast-conserving surgery: mammography X-ray every six to twelve months, for non-breast-conserving surgery, once a year. In addition, for patients taking oral triamcinolone acetonide, annual gynecological examination should pay special attention to endometrial thickness, and for menopausal or oral aromatase inhibitor patients, bone health (e.g. osteoporosis screening).