Kidney stones 9mm may not be able to pass out of the body on their own and require extracorporeal shock wave lithotripsy and, if necessary, ureteral lithotripsy with flexible ureteroscopy to remove the stone. Under normal circumstances, kidney stones larger than 9mm in diameter can not be discharged on their own, and may get stuck at the end of the ureter, causing severe irritation to the ureteral wall, which may lead to severe lower back and abdominal pain, hematuria, urinary difficulties and other symptoms, and in severe cases, may also lead to hydronephrosis, which may cause kidney damage. Therefore, kidney stone 9mm can not be discharged by itself, usually need to carry out extracorporeal shock wave lithotripsy, the stone will be broken, the stone can be discharged to the outside of the body with the urine, if the effect of two times of extracorporeal shock wave lithotripsy is unsatisfactory, should be considered for surgical treatment, for example, ureteroscopy lithotripsy lithotripsy. Therefore, after suffering from kidney stones, you should consult a doctor as soon as possible for examination and treatment, and do not deal with them on your own to avoid serious complications.