I'm developing a pain in my left foot, the same one that I had surgery on last year.  The pain is the same type as my Achilles tendinitis but in a different location, just below my outer ankle.  I've been doing some reading, and think it my be peroneal tendinitis.  One cause is overuse, and I have been walking a lot.  I only did 1.5 miles today and am going to keep it there for a while.  Last thing I need is another long recovery due to foot surgery.  Right now the pain is mild and intermittent, but that's how the Achilles tendinitis started, too.  I don't want to stop walking altogether, but if the pain gets worse, I will.