Nerve

As can be seen, edema has returned by a small amount. The lower part of the ulcer a short 'french fry' line can be seen. I think it's a nerve because if it is touched or pressed a bolt of pain shoots down my ankle into my foot. This explosion of pain is so great I simply can't put it into words. If you can imagine lightning in a bottle but instead in your foot, you'll get the idea. Thankfully this doesn't happen often.