kidney obstruction
A ureteral obstruction is a blockage in one or both of the tubes (ureters) that carry urine from the kidneys to the bladder. Ureteral obstruction can be cured. However, if it’s not treated, symptoms can quickly move from mild pain, fever and infection to severe loss of kidney function, sepsis and death.
Symptoms:-
1-Pain
2-Changes in how much urine you produce (urine output)
3-Difficulty urinating
4-Blood in the urine
5-Urinary tract infections
6-High blood pressure (hypertension)
7-Pain so severe that you can’t sit still or find a comfortable position
8-Pain accompanied by nausea and vomiting
9-Pain accompanied by fever and chills
10-Blood in your urine
11-Difficulty passing urine
Causes:-
1-A second (duplicated) ureter:-
This common condition, which is congenital, causes two ureters to form on the same kidney. The second ureter can be fully or only partially developed. If either ureter doesn’t work properly, urine can back up into the kidney and cause damage.
A blockage (obstruction) where the ureter connects to the kidney or bladder:-
This prevents urine flow. A blockage where the ureter and kidney meet (ureteropelvic junction) may cause the kidney to swell and eventually stop working. This condition can be congenital or can develop with typical childhood growth, result from an injury or scarring, or in rare cases, develop from a tumor. A blockage where the ureter and bladder meet (ureterovesical junction) may cause urine to back up into the kidneys.
Ureterocele:-
If a ureter is too narrow and doesn’t allow urine to flow completely, a tiny bulge in the ureter (ureterocele) may develop. When a ureterocele develops, it’s usually in the section of the ureter closest to the bladder. This can block urine flow and cause urine to back up into the kidney, possibly leading to kidney damage.
Retroperitoneal fibrosis:-
This rare disorder occurs when fibrous tissue grows in the area behind the abdomen. The fibers may grow as the result of cancer tumors or from taking certain medicines used to treat migraines. The fibers encircle and block the ureters, causing urine to back up into the kidneys.

