I had a cut on my foot a while back, and had thought that it'd healed over, don't really look at the bottoms of my feet that often y'know, and come to find out that not only is it not healed... it was a giant black spot.
So naturally I freaked and poked it open with a pair of tweezers to prevent the inevitable zombie apocalypse, because surely that's how it starts, and black bloody ooze comes out of it.
So needless to say I'm going to see my step-father tomorrow, he's a doctor, and the topic of this thread shall be the most disconcerting and/or frightening medical problem you've had.
You may now commence.