I have varicocele in my both testicals, is surgery necessary, becouse I am afraid that it couse infertility, and is it ok to treat it later, I'm 17?

Scrotums. Surgery for this problem is a last resort and not a common first line of treatment. Usually waiting and observing is appropriate given that these fluid filled cysts will shrink with time. If the cysts do not dissipate then something more worrisome may be going on and i would then refer you to a urologist for further evaluation.
Varicocele. I would definitely not have surgery at this time. If it is necessary it can be done later.
Varicocele. I would strongly recommend that you have your primary care physician to refer you to a urologist.