I itch, therefore I am

Whatever it is that is making me itch -- poison oak, poison ivy, poison sumac, or something else poison -- is driving me insane! My entire shoulder is red and blistery, and it has moved onto the left side of my chin. I've got it on the webbing between the fingers on my left hand. I think it's spreading to the tender area behind my right ear. Needless to say, I'm miserable.

Pictures of my misery to come.