If the kidney stone enters the ureter, it is the best result for the patient if it can be discharged from the ureter on its own, but often the stone cannot continue to travel down the ureter and obstructs the ureter, resulting in hydronephrosis and then kidney function damage. There are several methods to treat ureteral stones. First, spontaneous stone removal, for smaller stones (less than 5mm in diameter), we can promote stone removal by drinking more water and exercising more, usually after a period of time, most small stones can be spontaneously removed. For stones of about 1cm in diameter, they cannot be discharged by themselves because their diameter is much larger than the internal diameter of the ureter, so extracorporeal shock wave lithotripsy is often needed to break the large stones into smaller ones, which can be discharged one by one by using the urine stream. 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, so if you have more than 2 times of extracorporeal lithotripsy and the stone still cannot be broken, it is not suitable for extracorporeal lithotripsy. However, because ureteroscopy is performed inside the ureter, it may cause ureteral injury and should be performed with caution. Fourth, percutaneous nephroscopy is only suitable for large stones (>2 cm in diameter) in the pelvic ureteral junction or the upper ureter, where other methods are either ineffective or too inefficient. Percutaneous nephrolithoscopy requires an eye in the kidney and involves some renal damage. Therefore, the indications are not as broad as ureteroscopy. In your case, depending on the volume of ureteral stones, ureteroscopy should be used for treatment.