If there is fluid accumulation after breast cancer surgery, it usually requires timely puncture and drainage, or even tube drainage, and if necessary, prophylactic anti-infection treatment, because there are two main reasons for fluid accumulation after breast cancer surgery. In this case, timely drainage is needed, otherwise the blood, which is rich in bacterial cultures, may cause secondary infection. If infection occurs, anti-infection treatment is needed. On the other hand, it is mainly due to the fact that the axillary lymph node dissection is rich in local lymphatic vessels, and lymphatic leakage may occur. In general, lymphatic leakage is mainly drained by placement of a tube and pressure dressing, and no anti-infective treatment is needed.