Runny water generally refers to traumatic secretions or the presence of urine outflow. After nephrostomy tube removal, the fistula opening usually heals in 1~4 weeks, and the exact time varies from person to person. When patients are treated with nephrostomy, the fluid in the renal pelvis can be drained out of the body through a catheter. After removing the fistula, patients may still have wound secretion, usually after 1~2 weeks, the wound secretion can gradually disappear and the fistula heals. Some patients after removing the fistula, there may be secondary bacterial infection, which will cause stimulation of the fistula site leading to increased secretion, patients should take appropriate methods of treatment in a timely manner, generally need to be treated for about 4 weeks the wound secretion may disappear. But the specific time also depends on the specific situation. Patients with secretions or urine leakage after fistula removal should go to the hospital in time and take appropriate treatment.