Okay, so for years I've had this hard ball INSIDE my earlobe. One time I punctured the skin with a needle (more than a year ago), and pus and blood came pouring out. Interesting note, the pus had a very pungent, almost ammonia-like odor. My ear was absolutely deflated for awhile, and I was happy.
Since then, the ball of pus has grown back. I finally built up the nerve to poke it again. Couldn't go deep enough. Just made it bigger and painful.
What is it?