Lump on scrotum

I am 37, and have had this lump on my scrotum for the past 2 years, maybe longer. The lump is hard, and doesnt cause any bother. It hasnt changed since i found it there. Its usually not noticable on the scrotum. When it is squeezed VERY hard, it begins to hurt, but never aches. Nothing has ever came out of this lump - its not like a spot or pimple, its just hard. When beginning to squeeze, it becomes white/blueish.
Its size is about half that of a BB pellet, so about 2-3mm in diameter - Tops.

I have also noticed a few (3) veins running either To it, or along side (closely) to the lump.

Its not painful nor aches when left alone, in fact, its as if its non-exsistant. Its in the skin of the scrotum, not ontop, nor on a testicle. I can move it but is still attached to the skin.

Im just curious of what it could be, and is it a possible threat?

Also, if i need to seek help / treatment, where do i go?