get it checked out! one of my best friends had the same thing. bad news - it was testicular cancer. good news : after surgery and a little radiation he was fine. still healthy today, almodt ten years now.

@rayne - thank goodness

It's not on my scrotum. It's on the skin about 2 inches lower.

So do you mean on the perineum? (the area behind the scrotum but in front of the anus)?

Yeah that sounds about right.

if it is on the surface could be an infected ingrown hair. regardless, any problem down there deserves attention

Yeah, a lot of sweat/trapped heat in that area...still worth checking but yeah its likely to be any number of less severe things - Again just hit up a doctor, for peace of mind alone (or valuable better sooner than later advice) it's definitely worth it.

One time, I had a pimple on my ballsack.
Not on a nut or anything just the skin...but by the time I felt it, it was quite solid...reminded me of having a pimple in my earlobe, kinda.
So, I went at it...got it between two thumbnails and squeezed. It stung like a bitch and then popped after a while, more like an explosion really.
I swear, there was a crater left in my ballsack that day.
I wondered if it had went through - a quick test of the theory with the stripped edge of a cotton tip combined with no presence of ball fluid leakage indicated that the breach was only superficial.
This is my tale.

As others have said, it could be a number of things - could be a cyst, a boil, a lipoma, ingrown hair, and others. Not likely that it is something cancerous, but not ruled out either.

You need to get it examined by a doctor though - it is not possible to diagnose over the net and also not a good idea to rely on the opinion of people who you don't know the qualifications of.

Good luck with getting this sorted-after the scare over my tonsillectomy I completly understand how you feel being nervous towards medical practitioners-luckily that operation I missed wasn't essential but I think this could be. The only thing I can suggest is writing down what you want to say and giving the doctor the note to save you being nervous if you see a doctor.

I think it was nothing to be concerned about. The lump has went away so I think it was just a cyst or a build up of some kind.

That's great news :)