Ureteral stenosis causing hydronephrosis requires surgical treatment under general anesthesia, which mainly includes two surgical methods: dilatation and plasty. Ureteral stenosis can cause dilatation of the ureter above the stenosis site as well as hydronephrosis, which can affect renal function and even renal atrophy in severe cases, so it is necessary to deal with the stenosis site in a timely manner, to release the obstruction and maximize the protection of renal function. Ureteral stenosis surgery is usually performed under general anesthesia, and the surgery is mainly divided into two surgical methods: dilatation and shaping. If the degree of ureteral stenosis is not serious and the stenosis is not too long, a stent tube can be put into the lumen to dilate the stenosis temporarily. If dilatation fails, ureteroplasty can be performed to remove the narrowed segment and then reanastomize the normal ureter at both ends. Therefore, if you have ureteral stenosis and hydronephrosis, it is recommended to go to the hospital for timely consultation, complete the relevant examinations, and then choose the appropriate treatment plan according to the results of the examination and the patient’s status.