Hydronephrosis is caused by the retention of urine in the renal pelvis, which cannot be discharged smoothly through the ureter and is retained in the renal pelvis. The cost of treatment is directly related to the cause of hydronephrosis. The common causes of hydronephrosis are ureteral stones, polyps, tumors, stenosis, etc. In addition, huge bladder stones and bladder tumors compressing the ureteral opening can also cause hydronephrosis, and long-term chronic urinary retention in patients with severe prostatic hyperplasia is also a cause of hydronephrosis. This is why the cost of treating hydronephrosis is not good. Therefore, the cost of treating hydrocele is not easy to assess, if it is caused by tumor, the treatment cost will be higher, if it is caused by uterine pressure in late pregnancy, the fluid will subside after delivery, so there is no need for treatment and the problem of treatment cost will not arise. To sum up, the treatment cost of hydrocele is directly related to the cause of hydrocele, and the treatment cost cannot be accurately evaluated.