Does frequent masturbation make the penis bigger and does masturbation affect the kidneys.

No and No: Masturbation doesn't do either, it also doesn't make you go blind or bald or any other internet nonsense. If it did, every male your age would have a huge penis, be bald, blind and in kidney failure. Don't get your medical information from friends, tv or the internet.

Masturbation effects: In short, the answer to both of your questions is "no".