Admire the close-up action. After thorough internet research (ie; googled "cyst" and "hand), I have diagnosed myself with a ganglion cyst. Apparently, they're not too life-threatening or anything--but I have made an appointment with my doc just in case it is a tumor. Or a massive blood clot just waiting to be free so it can float up my artery and into my brain causing a massive embolism. Or blowfly eggs incubating tiny flesh-eating maggots that will hatch and begin to devour my body from the inside out.

I'm sure it will be fine.