It is not recommended to crush the kidney stone when it reaches the ureter, if there is kidney stone, it should be treated actively. If the kidney stone has already reached the ureter before lithotripsy, the kidney stone may get stuck in the ureter and cause urinary tract infection, hydronephrosis, and even affect kidney function, so if you have a kidney stone, it should be treated in time. Kidney stone treatment includes extracorporeal shock wave lithotripsy, percutaneous nephrolithotripsy and lithotripsy, ureteroscopic lithotripsy and lithotripsy. If lithotripsy is considered when the stone reaches the ureter, there is a possibility that larger stones may become stuck in the ureter, which is likely to cause hydronephrosis or even renal insufficiency in the long run, and will also lead to increased difficulty in treatment. Therefore, if you have kidney stones, it is recommended to go to the hospital for treatment as soon as possible to avoid further aggravation of the condition.