Last night, while "playing" with my cat (though he had a weird idea of "playing"), I sustained a puncture wound to the knuckle of my right index finger. I thought nothing of it, since I always have a scratch or two on me from "playing."
But today, my finger is swollen, stiff, and painful. I can barely type, much less play the piano or hold a tennis racket (two things I'm supposed to do today).
I wonder if it's swollen because the (somewhat deep) puncture is right in the knuckle, or if it's infected. If I'm still in major pain after another day or two, I guess I'll go see the doctor.
Ah, what a nice way to start the week! (My freshmen would tell you that this sentence is an example of verbal irony.)