After breast cancer surgery, drainage tubes are generally required. Negative pressure drainage ensures that there is no accumulation of fluid after the surgery, and it also allows for observation of any postoperative bleeding. In most cases, if the drainage is substantial, the tube can be removed four to seven days after surgery, but it can generally be removed around three days post-operation. The drainage tube should always be kept clear. If the drainage is obstructed, a small amount of saline water can be used for flushing, or the drainage tube can be moved to achieve adequate drainage. The drainage fluid should be emptied daily, and care must be taken to maintain the sterility of the negative pressure drainage device.