Hi I'm A 16 Year Old Male And I'm Having

Hi I'm a 16 year old male and I'm having a pain in my testicles and I think if I masturbate it would help. I only have one problem with that I don't know how to masturbate can you please tell me how. I would very much appreciate it. I was also wondering if when I go in for my physical if my pediatrician can demonstrate to me how to masturbate on my own penis.