Hello, im a 26 y old male.
Last week I noticed a lump right under the skin, in the area between my anus and testicles. I figured it was just a sweat bump or ingrown hair type problem. But now the other day I noticed its becoming elongated, (running from anus to testies) like a ....Um.... Bic lighter???

When I noticed the increase in size I tried sqeezing some of its contents, and I can manage to sqeeze out some pimple like puss, but its not emptying like id like it to!

I cant tell how connected it is to its surroundings, its slightly painful and pretty hard and seems like its ready to pop, but its hard to tell?

Its confined to one side and is where the butt cheek starts under the testies? If it doesnt clear up, my insurance is about to kick in and I will definately go get it checked out, was just wondering if any knowledgable people out there might know the cause of this.
I've had my share of ingrown hairs large pimples and such, but this is by far the oddest shape/location and of course largest.
Any help will be appreciated!