The patient was examined for urinary ultrasound or CT and a stone of about 9 mm in diameter was found in the kidney, which could not be easily expelled if conservative treatment was performed. Extracorporeal shock wave lithotripsy is recommended to ensure the patency of the urinary system. Usually the stone is broken into two or more segments, and conservative treatment can be performed to remove the stone. However, if the patient has a previous urinary tract infection or has ureteral strictures, the infection inflammation should be controlled first and the urinary strictures can be released at the same time. This is because even if the stone becomes very small after lithotripsy, it cannot be removed on its own if there is a urinary stricture. Therefore, for 9 mm stones, lithotripsy, including extracorporeal shock wave lithotripsy or ureteroscopic holmium laser lithotripsy, followed by conservative treatment for stone removal, should be performed first, which usually leads to a complete cure.