Actually that's encouraging and so far that's exactly what it is. Hopefully it won't progress any further than that.
It was meant to be encouraging. :-). But also honest. If he is not diabetic then there is no reason to think it’ll get worse. In fact mine virtually disappears for weeks at a time.
Another thing is, while the foot pain can be bothersome when I go to sleep, it doesn’t last, so don’t be quick to start taking painkillers or sleep meds. After some period of time the pain will subside on its own. If he is like me, it’s never there in the morning.
I saw the recommendation for magnesium. Supplements are worth a try but keep in mind the above - there could be long cycles of more or less sensation, so if he feels better in a few days or even weeks, it doesn’t mean much. Probably a cal-mag is a good idea in any case.