This is because after the stone is crushed into small particles, it will be gradually discharged to the bladder through the ureter with the urine, but because the stone is irregular in shape, it will scratch the ureteral wall during the discharge process, and the pain will be perceived because of the rich nerve tissue under the mucosa of the ureter. Generally, when the pain occurs after lithotripsy, you can apply medications, such as 6-542 or oral flavonol permethrin tablets, which can play a good role in expanding the ureteral duct diameter, and the stone will be discharged more smoothly. However, in some cases, stone lithotripsy is not successful, and the stones remain in the ureter for a long time, forming encapsulated inflammatory stones with the mucous membrane, and local pain symptoms may occur, so it is recommended to treat this condition promptly and also to keep drinking plenty of water. If the location of the stone remains unchanged for a long time, other treatments such as laparoscopic ureteral lithotomy will be required.