Ouch

My foot hurts, and I can't figure out why. I first noticed it weeks ago, but didn't think much of it at the time. I've had a lot of general achiness in my feet for the last couple of years as my bunions have gradually gotten worse, and sometimes when I've been walking a lot my arches hurt, especially if my shoes aren't laced up exactly right. But this is definitely something different, and there's a spot on the outside of the heel that hurts quite a lot when I press on it. It's weird. There isn't anything visibly wrong with it, and I don't remember injuring it at all. (Well, with the way my memory works, it's always possible that I did and just completely forgot about it, but I don't think so.) Given that it has been weeks, I suppose I ought to think about seeing a doctor or something. I'm not in a big hurry, though. It doesn't hurt anywhere near enough to keep me from walking or anything.