It is not worth it to seriously injure a healthy kidney because of a stone in the ureter. Ignorance, mistreatment, yes, no. One month ago, a 35-year-old woman of Sichuan origin, who had been found to have a right ureteral stone for 7 months, had received 4 times extracorporeal shock wave lithotripsy treatment and had no discomfort since the second lithotripsy, and came to the lithotripsy department of the Fourth Hospital for treatment only because the stone had not shrunk, 1 month after the last lithotripsy. He was diagnosed with right ureteral stone with obstructive nephropathy at the level of the third lumbar vertebrae and an oval-shaped stone with a length of about 20 mm. Holmium laser lithotripsy under ureteroscopy was taken, and the stone was found to be encapsulated by granulation and the ureter was completely obstructed. On review 1 month after surgery, the right hydronephrosis improved and renal function recovered slightly. The anatomical reasons for multiple kidney stones may not have a significant effect on renal function, but even a small stone in the ureter, once it causes complete obstruction of the ureter, can lead to loss of function of the ipsilateral kidney, which is medically known as obstructive renal failure. The above-mentioned case misconception 1, stones are not painful and can not be treated urgently; practice has proved that urinary stones cause severe pain, mostly suggesting that the stones are moving in the direction of the urinary stream, the disappearance of pain is not a sign of stone discharge, with the stone in the new location for a longer period of time, the ureter adapts even without any treatment, the pain symptoms will naturally ease, this painless ureteral stones often lead to complete ureteral obstruction, and eventually may be due to prolonged hydronephrosis pressure on the ureter. Eventually, it may cause loss of renal function due to prolonged hydronephrosis compressing the renal parenchyma. Because of the compensation of the opposite healthy kidney, the body will not show any renal insufficiency, so it is more terrible to be painless than to have pain. Misconception 2, that shock wave lithotripsy is non-invasive, over-reliance on this; before the third lithotripsy, a doctor has told the patient should take other treatment modalities, because of the absence of symptoms, with the attitude of trying, the patient asked for another 3rd and 4th lithotripsy. The Chinese Medical Association guidelines for the treatment of urolithiasis have clear indications for extracorporeal lithotripsy of ureteral stones, like the above case, where the stones are 20 mm in length and have been in place for more than 2 months, and where there is severe hydronephrosis and basic loss of renal function, are contraindications to extracorporeal lithotripsy. Clinical practice confirms that extracorporeal lithotripsy, although non-invasive, is not non-invasive and the damage to the ureteral smooth muscle recovers at least after the 5th day. The damage to the kidney is much longer or even permanent, and it is not conclusive whether it causes nephrogenic hypertension. Therefore, the guidelines and regulate the energy, number and interval of lithotripsy shock waves. Minimally invasive over-range applications can lead to severe trauma. Medicine is a comprehensive science based on theory, practice and experience, and going against medical science will cost pain or even life. Likewise doctors should adhere to science, be practical, human-oriented, treat the patient according to the disease and individualize treatment. The patient’s temporary satisfaction may cause lifelong regrets, and the truth is the eternal memorial between doctor and patient.