Locate the renal stone with pain radiating to testicle due to slipping of stone:

Stone in distal ureter: Calculi in the lower ureter often cause pain that radiates to the groin or testicle in males and the labia majora in females. Stone in renal calyx: The pain is a deep, dull ache in the flank or back that can vary in intensity from severe to mild. The pain may be exacerbated after consumption of large amounts of fluid. Stone in renal pelvis: Stones in the renal pelvis >1 cm in diameter commonly obstruct the ureteropelvic junction, generally causing severe pain in the costoveebral angle, just lateral to the sacrospinalis muscle and just below the 12th rib. It often radiates to the flank and also anteriorly to the upper ipsilateral abdominal quadrant. Stone in upper and mid-ureter: Stones or other objects in the upper or midureter often cause severe, sharp back (costoveebral angle) or flank pain. Ref: Stoller M.L. (2008). Chapter 16. Urinary Stone Disease. In E.A. Tanagho, J.W. McAninch (Eds), Smith's General Urology, 17e.