Hydronephrosis 2 years kidney damage, if it is mild hydronephrosis or the duration of hydronephrosis is relatively short, it is possible to recover through timely treatment; however, if the condition is serious and has not received timely treatment, it is generally not possible to recover due to the long duration of the condition. If the hydronephrosis is not serious, the degree of kidney damage is relatively mild and the symptoms are not obvious, most patients can recover their kidney function through timely treatment. However, if the hydronephrosis is more serious and the amount of fluid is more, the condition is easy to recur and cause kidney injury, in this case, even if the cause of the disease is removed, the renal function can not be restored to normal, and the condition of some patients further develops, and they may develop into uremia or enter the stage of renal failure. If you have hydronephrosis and it lasts for 2 years, it is recommended to have further examination to understand the development of the disease and follow the doctor’s instructions for targeted treatment.