Hey everyone. I am stumped. I have had a "knot" in the arch of my left foot for a month now. It is at the back of the arch right next to my heel but not in the heel at all. It hurts occasionally but not when I am running. I ran a ahlf marathon last weekend and it was fine. Mostly walking around in shoes is when it bothers me. Has this been covered here before and I am missing it? I have tried rubbing it out to no avail. Should I get a professional massage? Any advice would be welcome.