I've just started running again, following an op on my nerve, after more than a year of injury. At the start it was very frustrating trying to explain the problem and get anyone to take it seriously.
Eventually I had an MRI that showed nothing. Then consultant who had a pretty good idea, he sent me to a neurologist, who did a nerve conduction test, finding a problem. Nice to know it wasn't all in my mind! Eventually I opted for surgery so they could take a look, they found a healthy looking nerve and no obvious entrapment. But basically gave the nerve more room, it seems to have done the trick, or at least improved things considerably.
It was very hard to describe the feelings to doctors. For me. at various times I had: Burning sensation over foot. Reduced feeling / sensation on the skin, not bad, but it didn't feel quite like mine! Whilst my skin couldn't feel quite so well, if I'd had a day on my feet, it felt numb inside. I fell down the stairs many times because I couldn't feel where my foot had landed. Sometimes I got a very quick shiver up and down leg. Or felt like someone had poured ice down my vein! Pins and needles. That could be very hard to describe, sometimes it was classic pins n needles, other times not.. One consultant asked me if, when she ran hand over the area, if it felt like a weaker version of banging your "funny bone" (elbow) and that was exactely how it felit. Exercise and flexing my foot brought it on.
Not sure if any of that helps at all. Nerve problems aren't one of the more common running injuries, so I suppose they're a bit harder to find people who've had experience.
Depending on the race size I'd have two or more pairs of people working together. One to write and one to look and shout number and time. More then one pair so you can double check results against each other. If you only want times and finishing places for prize winners remember to take down more results than you'd think if you have categories for male / female / age.
I've had paraesthesia in lower leg and foot and pain foot due to a nerve problem. Sometimes pain or paresthesia is reffered from somewhere else, EG I got sensations in my foot but the problem was located in the lower leg.