Hi Help me,
I am presuming that the mass you are feeling is on the testis and not elsewhere in the scrotum based on your post topic. If this is the case I would recommend you have this evaluated. Testicular cancer often presents as a painless mass in the testis. If caught early the prognosis is very good.
Advice and opinions given are based on the information provided and must not be considered an official medical recommendation. The limitations of the internet prevent an appropriate evaluation. Always consult your doctor if there is concern.