Dear Madam, I have been repeatidly requesting on this forum to detail your symptoms, rather than telling the so called diagnosis, your mother is facing issues with nerve block, how did you come to know that, and if someone told you this, which nerve is blocked?, she has swelling in feet, what other areas or joints are affected by this, straight forward going for an nerve conduction study will only be waste of resources, unless we know in detail what issues she is facing.

X-ray  of ankle with nerve conduction study us required.