A 13mm stone in the lower calyx of the right kidney indicates that the stone is large in diameter and cannot be expelled on its own. Extracorporeal Shock Wave Lithotripsy (ESWL) is usually performed, and surgical removal of the stone is also required if necessary. 1. Extracorporeal Shock Wave Lithotripsy: For 13mm right lower calyceal kidney stone, as it cannot be discharged by itself, extracorporeal shock wave lithotripsy should be considered to break the stone, and then increase the amount of drinking water and urinate repeatedly, the stone may be discharged out of the body along with the urine. 2. Surgery: 13mm stones in the lower calyx of the right kidney, the effect of extracorporeal shock wave lithotripsy is not ideal, if necessary, surgical treatment, such as percutaneous nephrolithotomy. If necessary, surgical extraction should also be carried out directly to remove the stones directly to avoid damage to kidney function. During the treatment period, patients should actively cooperate with the doctor for treatment, and should not carry out treatment privately to avoid causing serious complications.