After standardized treatment of breast cancer, 20-30% of patients may have the risk of recurrence and metastasis, and the level of risk is time-dependent. Therefore, for patients with breast cancer, regular review and follow-up are necessary after the completion of in-hospital treatment to detect and deal with possible risks in a timely manner. Follow-up time: According to the NCCN breast cancer treatment guidelines, breast cancer patients should be reviewed every 3 months for 2 years after the completion of in-hospital treatment (after the end of adjuvant chemotherapy and/or radiotherapy), every 6 months for the second to fifth years, and once a year after the fifth year. Follow-up examination content: each routine review includes physician’s physical examination by touch, abdominal and pelvic ultrasound examination, blood biochemistry, blood routine, serum tumor marker examination. Other special examinations: chest X-ray (to know whether there is lung metastasis) once every six months for 5 years, and once a year thereafter. X-ray of the healthy breast (for patients after total mastectomy) or bilateral breast (for patients after breast-conserving surgery) once a year, bone scan examination once a year (for the presence of bone metastases), gynecological examination (once a year during treatment with triamcinolone, toremifene, etc.), bone density (for patients under treatment with aromatase inhibitors). If significant discomfort occurs between reviews, such as prolonged cough, abdominal distension, bone pain, headache, wasting, skin nodules, etc., you should go to the hospital immediately to rule out whether it is caused by the tumor.