Im a 40 yo male and I recently noticed that one of my testicles is larger than the other. Strange, I just finished running a half marathon in Vegas, when I returned home Tuesday morning is when I noticed it, maybe is been there all along but never paid attention??? I feel no pain but the larger size one, feels a bit harder than the smaller one. Everything other than the size appears normal...and I just read a story that over 800 runners got sick over possible contaminated water, could contaminated water affect the testicles?
Should I be concerned????