It has been more than 50 days since the drainage tube drained fluid after breast surgery, and it is still 70-80 ml. The reasons to be considered may be lymphatic leakage, incomplete hemostasis, wound infection and so on. 1. Lymphatic leakage: Generally, for the surgical treatment of malignant diseases of the breast, such as breast cancer, lymph node dissection is needed, and the lymphatic vessels may be damaged during the operation, and there may be a long period of drainage fluid after the operation, and it is necessary to carry out laboratory tests on the drainage fluid to determine whether it is a leakage of lymphatic fluid or not. At present, the clinical treatment for lymphatic leakage can generally be injected with glucose solution to accelerate the closure of lymphatic leakage, standardize the local dressing change, carry out appropriate compression bandage, and avoid consuming too much fatty food to avoid producing more lymphatic fluid. 2. Incomplete hemostasis: Due to the damage of blood vessels during surgery, the blood vessels have not fully recovered during the recovery period, resulting in persistent bleeding which may also lead to excessive drainage. 3. Infection of the wound: the surgical wound is infected by bacteria and other infections, leading to local inflammatory symptoms inflammation, may also lead to a large amount of drainage. After breast surgery, you need to standardize the care, if there is discomfort, changes in the color of the drainage fluid need to consult a doctor in time, under the guidance of the doctor to improve the relevant examination, to avoid deterioration of the situation.