The impaired renal tubular function caused by hydronephrosis may or may not be able to recover, and cannot be generalized. 1. Recoverable situation: hydronephrosis is generally caused by urinary obstruction, if it is caused by acute obstruction (such as ureteral stone), timely consultation at the onset of the disease to the hospital, and early relief of the obstruction, then the renal tubular function can be recovered in general. 2. Can not be restored: hydronephrosis is caused by urinary tract tumor or long-term urinary tract stone, then the damage is a long time process, chronic damage, timely relief of obstruction, but the renal tubular function has been seriously damaged, this situation generally can not be restored. Hydrocele caused by renal tubular damage can not be recovered, according to the time and severity of the disease to determine, it is recommended to timely to the regular hospital, follow the doctor’s instructions for treatment.