FWIW, it happened the other way around. The edema came first, followed by the first PN symptoms several months later. When I questioned (several) doctors about a possible cause-effect relationship as mentioned in the Wiki, they all said my edema was not severe enough to cause PN. I had to convince one doctor that it was edema by pressing my thumbprint into my foot. It was not quite as severe as that depicted here, but very close.

I tried raising my feet at night for a few weeks, but it didn't help much - probably because I have to sleep on a high wedge anyway.

Doc