In reply to norrisdan71:
I have frozen my feet in various stages stopping short of real / deep tissue-bone damage (like the toe nails swollen with puss and I could rip them all off easily). This was all cold damage.
It might take 2-4 months for sensation to come back. Repeat exposure seems to make your toes quick to go numb (same for fingers) which I feel is annoying when cold weather sport climbing. Maybe just fewer nerves.
In my experience it did not make a huge difference in terms of going back for more cold - I suspect (but no expert) that this is an over reaction in terms of doc advise. If you have frostbite proper your flesh rots off your feet (happened with my partner) and then eventually they amputate... in this case repeat exposure is not ideal. It sounds like you have a bit of frost nip.
I also found that over the years it made me have hot feet - like wearing shoes was too much in offices/pubs etc, which can be a sign of nerve damage or it might just be me being weird.
Anyway, either get a second opinion from a cold damage expert or maybe don't worry too much (unless you need an excuse to do something else
) I'm sure it will be fine!
Post edited at 23:05