@ankara-- What do you mean by numbing injections?
Anti-inflammatory and pain relieving injections are definitely common pinched nerve treatments. But I'm not sure if these are injected into the foot.
I have a pinched nerve in my back for years and now I also have a pinched nerve in my foot. I've had muscle-relaxers and pain relieving injections for my back, but not for my foot.
For my foot, I take regular, oral pain relievers and rest. I think that rest is the best treatment for a pinched nerve. Once the pressure on that part of the foot is relieved, things usually go back to normal. If you're worried about not being active, swimming is a good option.