Hi. I have already undergone a ureteroscopy for removal of my stone of 11mn stuck in the left mid ureter a month back. A stent was placed post the operation. Which was a removed a week back. Since last week I was again experiencing a pain in my right side for which I did a fresh sonography. The report showed a 11mn kidney stone in the middle pole of right kidney and to my surprise a 10 mm stone in the left u.v junction. I was shocked to get a stone again in the left u.v junction as I had just done an operation on the left side. I repeated the sonography today which showed the same results. What is the best treatment to cure the stones? Will it require an operation again?