Grrr, ow!

No idea what started it - possibly going out for a run in the car yesterday afternoon, it's my pedal pushing foot - but my right ankle has been killing me since yesterday evening. Anyone know which ligament/muscle/whatever runs from the outside of the foot and up the outside of the calf?

It's done it occasionally before, but I don't recall it being quite this painful (I'm having to actively ignore the pain, rather than just ignore it, if that makes sense).

Of course the advantage of being bendy is I have stuff at hand to splint it in the one position that seems to be least-painful, plus an armoury of walking sticks, crutches and wheelchairs to turn to if I need them, but it's still annoying.