a neighbour of mine had such severe pain from shingles, for months later that she was prescribed gabapentin for the nerve damage, but the pain persisted, may have been slightly less sharp than without. that was 5 yrs ago.
her health never really picked up, but she had underlying rheumatology disease, and is now bed-bound, having suffered 2 severe infections this year, including NF with large surgical excision and skin grafts.
I believe there is a vaccine against shingles, but usually only given to over 70s.
there is some connection to chicken pox, and I was interested to read that rarely some severe childhood cases of chicken pox can lead to NF.