3 siblings and neither my mother or father have/had it. Genetic testing can link the PN to family, but it's pretty much a waste of time and money because in the end Genetic and Idiopathic are the same thing....."We do not know the cause".

Most of us here(like myself) have found some relief by taking B12 and other related vitamin supplements that arrest or slow down it's progress. Read the entire sticky above by MrsD...very enlightening.

The best thing about this forum is that you can match symptoms with those here that have had a limited success in self treatment with the over the counter supplements which are relatively cheap.