Sometimes it is!
If just 2 or 3 toes are "numb" this could be from a specific type of nerve
irritation called a neuroma
If all the toes are numb, something else may be going on. See a podiatrist for a physical exam and diagnosis. Then specific treatment is much easier to recommend. If you want to try something on your own, try a metatarsal raise pad. http://www.hapad.com/search-by-product/metatarsal-arch-pads.h.