Leakage of cerebrospinal fluid after spinal cyst surgery is one of the common complications after spinal cyst surgery. It is usually treated by prolonging the time of extubation, strengthening the prevention of infection, continuous lumbar puncture drainage, autologous blood injection therapy, and secondary surgery for repairing the ruptured dura mater, and the doctor will determine the treatment method according to the specific conditions of the patient. 1. Prolonging the extraction time: in order to avoid the occurrence of infection, prolonging the extraction time, when the healing condition of the incision reaches the expected condition and the drainage flow decreases, then the drainage tube can be withdrawn, and the bandaged drainage port can be pressurized. 2. Strengthen the prevention of infection: in order to help reduce abdominal pressure, local sandbag pressure on the incision, the need to use thick pillows on the chest and hips, so that the abdominal position to maintain the suspension of prone state, in order to achieve the goal of strengthening the prevention of infection. 3. Continuous lumbar puncture drainage: it is a kind of operation to continuously drain cerebrospinal fluid through lumbar puncture to the lumbar big pool, which is a minimally invasive, safe and effective treatment measure. 4. Autologous blood injection therapy: Using autologous blood injected into the epidural to flow downward to the rupture of the dura mater to form a blood clot at the rupture, so as to achieve the goal of blocking the rupture. 5. Secondary surgery to repair the ruptured dura: This is only chosen when other methods are not effective and is not usually used. Cerebrospinal fluid leakage, if not handled properly, is likely to cause wound infection, intravertebral canal infection, or even intracranial infection in more serious cases. It must be handled carefully, or it may be life-threatening, and must be handled cautiously, and receive professional treatment in a regular hospital.