Just like what the discharge papers at the hospital said, I have internal derangement of my knee. The Very Nice and Extremely Cute orthopaedist (don't hassle me, that's how it's spelled on the sign) gave me the medical terminology for that: your knee is jacked up.
I have a little bit of osteoarthritis.
Apparently a little goes a long way.
He gave me a cortisone shot in my knee and a prescription for Mobic, which seems to be more or less like Aleve, except easier on the digestive system.
The cortisone shot didn't hurt going in, but it hurts now. My knee is stiff and it feels full, which it is. I'm guessing it will feel better in the morning, after a good night's sleep, when it's all gone to wherever it needs to go.