Stones in the suprarenal calyces are theoretically easier to expel. The reason is that when a person is in a standing position, the upper renal calyces are on top, which is conducive to the discharge of stones due to the effect of gravity. However, it also depends on the size of the stone. For small stones with a diameter of 0.6-0.5 cm or less, it is easier to expel the stone by taking lithotriptic drugs, drinking a lot of water and doing appropriate activities. However, if the diameter of the stone is too large, the stone in the small calyces, the diameter of the stone exceeds the diameter of the calyces, through the general conservative treatment, it is difficult to discharge, need to be treated by extracorporeal shock wave lithotripsy, or electronic ureteroscopy Holmium laser lithotripsy, etc., the stone will have a chance to be discharged only after broken.