White flocculent discharge from nephrostomy may be caused by urine sediment, tube blockage and wound infection. 1. Urine sediment: nephrostomy is mainly to put the drainage tube in the renal pelvis to drain urine or pus, so if the patient’s urine sediment is more, it may be manifested as white flocculent phenomenon. 2. Tube blockage: If the patient does not change the retention tube for a long period of time, the tube may be blocked, resulting in the accumulation of pus and sediment, which will lead to the phenomenon of white flocculent. 3. wound infection: nephrostomy is easy to cause wound cross-infection, if the patient also has fever, pain and other symptoms, it may be caused by wound infection. Therefore, if patients have the above symptoms, they should go to the hospital in time for examination and treatment after clarifying the cause of the disease.