I had very severe pain in my lower back. I took a scan and found that there is a 6 mm stone in the upper ureter. I was given IV fluids for 3 days and then I took scan again although I did not have any pain from that day after scan. The stone had moved down to mid ureter as per scan. I have not been having pain for the last 5 days. I was wondering if it would not pain when an 8mm stone I still in the mid ureter.