I would really describe the sore
as a raw skin
ulcer. It is flat, and it looks like the first few layers of skin are missing. It does not have a pocket like a blister, but feels as though it has some sort of fluid on the surface. I do not believe it is from rubbing, as I never wear shoes that go up that high. Additionally, all three have popped up in the morning when i wake up, so I doubt it is from friction. They are very slow to hear taking between 2-3 weeks.