I'm Having Pain In The Ball Of My Left Foot

I'm having pain in the ball of my left foot and it radiates sometimes on the on the side of my ankle to the tip of my great toe. Also, in my right foot great toe I have a stabbing pain. Both of these have the bottom of both of my feet burning during the course of my workday to the point where I have to take my shoes off. What is causing this. I'm not diabetic and I wear great walking shoes for my type of work