Open Question: I have a hard painful lump on the inside side of my foot. Any ideas?

Since the evening of that day, in the arch pain. Did not hurt it, or took the unusual day. In the next four years the pain has shifted to the side of my foot and the lump over the middle arch of the Center was established between the sole and most sore spot foot.It when I bend the big toe and the steps or one day, if I just peristalsis of the. I can not and sugar to the Friday appointment.