I was walking in my home this morning, barefoot and suddenly had a sharp pain in the bottom of my foot. When I sat down and felt it, it feels like a knot and is pink. It is square in the middle bottom of my foot. The pain isn't subsiding, but is only present with pressure. I have been seeing different podiatrist for for 2 years now for plantar f., and nueromas. I have done about all that I know from lasers, surgery, injections, b-12/alcohol infections. I'm at wits end, and here another problem.... Any thoughts on what this could be? Thank you!