Upper ureteral stones are stones located in the ureter from the pelvis to the UPJ (pelvic ureteral junction). There are two reasons for the formation of these ureteral stones: the first is the formation of stones in the ureter itself, secondary to ureteral stenosis, tumors and other lesions; the second is due to the presence of kidney stones that have not been removed and are temporarily obstructed in this section of the ureter during the process of discharge. Most of the stones we encounter clinically are of this type. The upper ureteral stones have the clinical symptoms and characteristics commonly found in ureteral stones, with obvious symptoms such as renal colic, hematuria, etc. They also often cause ureteral obstruction and hydronephrosis, and other complications of the kidney organs. Once discovered, serious consequences such as renal atrophy may occur; upper ureteral stones can easily lead to upper urinary tract infection to systemic infection, so the clinical risk is greater.