Breast cancer needs to be rechecked one month after surgery, usually once every month within six months, usually once every three months between six months and two years, and usually once every six months after two years. It is very important to have a review after the surgery for breast cancer, in the process of which the patient’s physical condition and the changes of tumor indicators can be understood, and ultrasound or MRI examination is also needed to determine whether the tumor will recur or metastasize after the surgery. In addition, if tumor metastasis occurs, it may cause lymph node metastasis or lung metastasis, bone metastasis and so on, then timely treatment is needed.