I have a numbing/cramping pain surrounding the ball of my foot at the 4th and 5th meta. This pain grows significantly greater when I first get out of bed in the morning, or if I'm laying on the couch at night, then I get up and try to walk. I don't remember injuring it but the pain has been there for four months. The pain feels like it is emenating from the top of my foot in the fleshy area between the 4th and 5th, close to the toes. It creates pain when I bend at the balls of the fourth and fifth. what can this be?