Pain On Outside Of Foot What Could Be Causing The Pain On The Outside Of My Right Foot?

What could be causing the pain on the outside of my right foot? - pain on outside of foot

I had done the X-rays, and they are very good. I had a cortisone injection, which lasted two hours. It feels like a needle or something pushed by my side hurts his foot and the ground, my foot and leg shoots up to the knee. I can hardly walk sometimes. He was wounded at least 4 months.