After hydrocele surgery, the following tests should be done: 1. routine urine tests, mainly through routine urine tests to understand whether there is infection and bleeding in the urinary system, that is, to understand whether the number of red blood cells and white blood cells in the urine exceeds the standard; 2. kidney function measurement, after hydrocele surgery to see whether kidney function has recovered, it is necessary to take blood to check kidney function, and compare it with the kidney function before surgery; 3. The kidney function is compared with the kidney function before surgery to understand whether the kidney function has been improved to a certain extent; 3.Urological ultrasound examination to understand whether the degree of hydrocele has been reduced or has been completely recovered from morphology, such as post-operative and pre-operative ultrasound, to measure the hydrocele in the kidney and dynamically observe the recovery situation; 4.Intravenous urography examination, mainly to understand whether the intravenous urography has returned to normal in morphology, whether there is obstruction or stenosis. whether there are obstruction or stenosis factors.