I underwent eswl for 6mm
kidney stones last week. After that I was able to see some stone fragments in my urine. Two days back I experienced severe pain and went to hospital. They took the scan and told me that remaining piece (4mm) is moving downward. It’s in the ureter now. Gave me few pain killers and told that it will take some time to pass through. Does a 4 mm stone by it's own or need medical intervention? How big is a human ureter. Doc prescribed few painkillers and medicine for relaxing the ureter