Patients undergoing chemotherapy for breast cancer need to note that: 1) chemotherapy regimens vary from patient to patient and from condition to condition; 2) even for the same chemotherapy regimen, the dose and duration of chemotherapy may vary; 3) even for the same chemotherapy regimen, the same dose and duration of chemotherapy, the response and efficacy of chemotherapy may vary from patient to patient. Therefore, each patient, at the follow-up clinic, should inform the doctor as much as possible about the uncomfortable reaction to the last chemotherapy, such as fever, diarrhea, oral ulcers, nausea and vomiting, heartburn and chest tightness, bloating and stomach discomfort, red and painful sensation of skin on hands and feet, etc., so that the doctor can provide better treatment and adjust the drug therapy if necessary. In general, during the period of receiving chemotherapy (including within one month after the last chemotherapy) 1, on the 7th day after receiving chemotherapy, on the 14th day, and within 3 days before the next chemotherapy, it is necessary to review the blood routine once to observe the changes of white blood cells and platelets. For some chemotherapy regimens, blood tests may be started on the third day after chemotherapy. For patients with significant changes in blood count during chemotherapy, the blood count should be closely monitored according to the doctor’s orders, once every 3 days if necessary. Generally white blood cell counts less than the normal range should be seen as an outpatient. (Patients who are able to do so are advised to produce a white blood cell count graph based on each routine blood result to facilitate observation of individual chemotherapy and white blood cell changes) 2. Patients with abnormal liver and kidney function underlying disease need to be closely observed. Above the upper limit of the normal range, outpatient consultation is required. 3. For patients with low white blood cells who need leukocyte boosting injection therapy after chemotherapy, the blood routine should be reviewed generally 48 hours after the leukocyte boosting therapy. According to the results of the blood routine review, decide whether to continue treatment. 4. For patients with a more obvious decrease in white blood cells, daily self-temperature tests with a temperature higher than 37 or 5 degrees are required for prompt consultation.