Hydronephrosis usually does not affect sexual function. Hydronephrosis is formed when there is an obstruction in the urinary tract below the ureter and the urine produced by the kidney cannot be discharged smoothly and accumulates in the kidney. Not serious and relatively short hydronephrosis will not affect the kidney function. Long-term and more serious hydronephrosis will compress the kidney parenchyma and affect the kidney function, so that the kidney function decreases or even disappears. In Western medicine, there is no direct connection between good or bad kidney function and sexual function. Sexual function is affected by a variety of factors such as hormones, the state of blood vessels, as well as mental and environmental factors. Chinese medicine believes that kidney deficiency and poor kidney function will affect sexual function, the kidney according to Chinese medicine does not refer to the kidney as a single organ, the meaning is more extensive. The kidney function in Western medicine is mainly to play the role of excretion, will not affect too much hormone secretion, vascular state, etc., kidney function to a certain degree of development may have some impact on sexual function.