Treatment for hydronephrosis depends on the underlying cause, such as a kidney stone or infection. Infections are treated with antibiotics, and kidney stones usually pass through themselves without treatment, according to the National Kidney Foundation.
A catheter may be required to drain the urine from the bladder, or a nephrostomy may be required to drain urine from the kidneys, states the National Kidney Foundation. Hydronephrosis is a condition that occurs when a kidney becomes swollen due to the failure of normal drainage from the kidney and bladder, according to Healthline. It typically affects only one kidney, although both kidneys can be affected. Hydronephrosis is not a disease, but a structural condition resulting from a blockage or obstruction in the urinary tract.
If left untreated too long, hydronephrosis can cause permanent kidney damage.