In reply to Pete_Frost:
Your post may have helped me figure out my injury, perhaps i have damaged my sesamoid bones. About 18 months ago I was on an easy alpine route when i booted the rock hard thinking it was snow, (i was looking over my shoulder talking to my belayer) and hurt my big toe, i gave out a very large yelp at the time but then it was fine for the rest of the day. It was fine for next couple weeks then suddenly was really sore and depending on what shoes i wore i could hardly walk on it. For a few weeks i had to go about in my mountain boots all day. It still isn't better although it doesn't actually stop me doing anything but is still a bit swollen and I feel it when i manipulate the toe and when standing on small edges climbing. A little concerned it could become arthritic and not sure if i should do anything about it.