I have noticed a small lump on the left side of my testicle?

Hello,

over the past for days i have noticed a small lump on the left side of my testicle. Its not on the testicle but just to the side. Sometimes it is hard to find when lieing down but can be felt when standing up.

I have also noticed a small ache/ pain in my left side of the groin on the same side of the testicle with the lump. I’m not sure what to do.

Age: 23
Male
Medications: none
No
General Information: