If kidney stones enter the ureter, it is the best result for patients if they can be discharged from the ureter on their own, but they often obstruct the ureter and cause hydronephrosis because they cannot continue to travel down the ureter, and then kidney function is impaired. There are three ways to treat ureteral stones: 1, spontaneous stone discharge, for smaller stones (diameter less than 5mm), you can drink more water and exercise to promote stone discharge, generally after a period of time, most small stones can be spontaneously discharged, if the stone is too large, the width of the stone is larger than the ureteral internal diameter, the use of drugs to drain the stone is not suitable, at this time, the stone is unable to pass through the ureter. 2.Extracorporeal shock wave lithotripsy, for stones larger than 6mm in diameter, as their diameter is larger than the internal diameter of the ureter, they cannot be discharged by themselves, so they often need to undergo extracorporeal shock wave lithotripsy to break the large stones into smaller stones, which can be discharged one by one by using the urine flow. However, extracorporeal shock wave lithotripsy has its own contraindications, such as bleeding in patients with abnormal blood clotting mechanism, and cardiac arrhythmias that may be aggravated by extracorporeal lithotripsy. In addition, repeated extracorporeal lithotripsy can lead to ureteral stenosis or renal atrophy, so you must be cautious. Therefore, if you have more than 2 times of extracorporeal lithotripsy and the stone still cannot be broken, you are not suitable for extracorporeal lithotripsy anymore. 3, ureteroscopy, most ureteral stones can be taken out of the body through ureteroscopic surgery, especially for patients whose extracorporeal shock wave lithotripsy is ineffective, most of them can continue treatment by ureteroscopic surgery. However, because ureteroscopy is performed inside the ureter, it may cause ureteral damage and should be performed with caution. 4. Percutaneous nephrological surgery is only suitable for large stones (>2 cm in diameter) in the ureteral junction of the renal pelvis or the upper ureter, which are either ineffective or too inefficient with other methods. Percutaneous nephrolithoscopy requires an eye in the kidney and involves some renal damage. Therefore, the indications are not as broad as for ureteroscopy.