Only a doctor can answer your questions. I myself had experienced a pain in my left testicle for a period of 3 weeks. I am not sure why I did but it went away on its own. It helped when I wore an underwear though. You might want to try doing that.
i also forgot to mention that i had a versectomy about 10 weeks ago i also had a lump come up a few days ago went up the docs with it but thay but it down to a infection could all my pain be apart of this infection many thanks
It wouldn't hurt to have it checked out, most of the time it is something simple like cysts, however it is always best to get it looked to avoid any major problems.