I am 15 years old, and recently my right testicle started to hurt. Not severe, but say I sit down I can start to feel a tiny tiny pain and then my brain focuses on it and makes it seem to hurt more. I'm worried to say the least. I am not feeling sick in any way. Peeing is fine no discolouration. No fatigue, no swelling (as far as I can tell) It even looks like the other one (although it's a bit higher than it. I do masturbate, and my first guess that would be a reason it hurts. (It happens a lot). If it helps, sperm is fine and is not discoloured in any way also. Any guesses doctors?