What causes kidney water?

There are many reasons for hydronephrosis. If the ureteropelvic junction is narrow, urine in the upper pelvis cannot pass through the ureter smoothly into the bladder urethra, so hydronephrosis will occur. Ureteral stones will also cause ureteral obstruction, resulting in hydronephrosis. Malignant tumors of the ureter can also cause ureteral obstruction, resulting in hydronephrosis. The elderly male prostate hyperplasia can also cause lower urinary tract obstruction, eventually resulting in hydronephrosis. Therefore, patients with hydronephrosis must go to the urology department for examination in time, after clarifying the cause, and then symptomatic treatment to achieve the purpose of lifting obstruction and protecting kidney function. Otherwise, for a long time in the past, it will cause hydronephrosis to worsen and affect kidney function.