Ultrasonic lithotripsy, also known as extracorporeal lithotripsy, is mainly used to treat kidney stones and upper ureteral stones. Generally speaking, if the indications for lithotripsy are strictly grasped and the treatment is done according to the lithotripsy operation protocol, there is not much impact on the kidney, otherwise there is a risk of damage to the kidney. If the energy of lithotripsy is increased and the number of lithotripsy is increased in order to speed up the discharge of kidney stones, especially if the interval between lithotripsy is shortened, such as less than 10 days, or if lithotripsy is repeatedly performed, it may increase the damage to the kidney, such as subperitoneal hemorrhage, perinephric hemorrhage, impaired renal function, etc. Therefore, even though extracorporeal lithotripsy is less painful for patients, it should be done strictly according to the treatment principles in order to avoid kidney damage.