CYST TYPE STONE IN BETWEEN THE SCROTUM.

I have a hard lump or stone my scrotum sac , it's located between the area of both  testicles . It feels like a cyst, stone, or some kind of hardened mass.  Chatgpt gave me by considering my summary it can be scrotal pearl,cyst or epidydymis cyst or calcification. its Painless and don't cause any discomfort in ejaculation or erection or any movment - Size around size of a rice and can be touched and feel by pinching the skin inside. It can't be seen by naked eye but can feel by 2 finger - it's been there for very long time - the hard cyst sometimes pain when I pinched it too harsh and it's surrounding nerve got irritate and starting pains. I sometimes have urge to check the area and touch that cyst Concerns:I would like to know if this could be a cyst, a calcified stone, or something else, and what tests or treatment might be needed. The images shows the exact area belw the fingr. its apart from testicle but can be feel on topmost skin as it attachd to the sac inside skin deeproot