The effect of congenital hydronephrosis on patients varies from person to person. In general, mild hydronephrosis has no obvious effect on life. Congenital hydronephrosis is mainly caused by congenital obstruction, such as obstruction at the renal pelvic ureteral junction, obstruction at the entrance of the ureteral bladder, and congenital giant ureter. The disease is usually asymptomatic, with occasional dull pain and mild discomfort in the lower back, or pain and pressure in the ureteral region. If secondary infection occurs, symptoms may appear. Mild hydronephrosis generally has less impact on life. If the hydronephrosis progressively aggravates and the renal function continues to decline, life will be affected, and surgical treatment should be considered, such as resection of the stenosis. It is recommended that patients go to the relevant departments of regular hospitals in a timely manner, under the guidance of professional doctors, improve the relevant examinations, clarify the diagnosis of the disease, and receive standardized treatment.