The more common reason for back pain after kidney stone lithotripsy is that the stones turn large stones into small stones after extracorporeal shock wave, and due to the large number, it is easy to form obstruction in the ureter and form a stone street. If the urinary tract is completely obstructed, timely treatment is needed. You can choose drugs that dilate the kidney blood vessels to release the ureteral spasm, and choose pain relief drugs such as morphine to relieve the pain. After the pain is relieved, you can promote the early elimination of stones by drinking more water, urinating more often and bouncing more. Small stones after lithotripsy, its sharp part will scratch the soft tissues during the descending process leading to back pain. Some stones are not easily discharged after lithotripsy and will get stuck somewhere, which is also the cause of back pain. Stones smaller than 5mm can be eliminated by drinking more water, and if they are larger than 5mm, you can boil water with moneywort and take it orally to promote stone removal.