After a 4-mile run yesterday, I felt fine all evening... then I woke up this morning barely able to walk on my right ankle. It feels stiff, a little locked up, painful when I put weight on it, but not swollen or visibly inflamed. I add distance to my runs very gradually to avoid this sort of thing, but it happens to me a few times every year, costing me 3 weeks of training time when it happens.
What could be going on here? I'm baffled by the sort of injury that could seem fine for up to 8 hours post-exercise, and then turn into something awful overnight while I'm asleep. Have been to doctors but all they want to do is throw ibuprofen at it (which helps a little in the short-term but doesn't help me understand how to avoid it).
Thanks in advance. God, I love a board that doesn't get its knickers in a twist over asking medical questions. Smells like freedom.