Arthritic ankle. Osteoarthritis from multiple sprains going back to high school. Three years ago I was doing one-legged box jumps. Two years ago, an Alaska sheep hunt. I couldn't do either one today, gets worse every year. Now it's like walking around on a sprained ankle, permanently.
The only long-term option for treatment is fusion of the ankle, and I don't want that. I'll try another cortisone shot this hunting season, see how that works.
