Shingles is awful! I had a small outbreak a few years back when then I was below the recommended level for the shot. If that was considered small, I don't want to find out what a bad case can be but I've heard some horror stories. Since then, I've gotten older and they've lowered the age limit. But then during Covid they were having shortages. Having had it recently, supposedly my immune system is boosted -- but some people do get repeat cases. Is on my list for this year.
Some people find some pain relief with gabapentin (prescription) but that puts some people to sleep.
I think it is related but whether it is or not, right after the shingles I developed sciatica. I found out that getting in and out of a car was an extremely complex motion that typically had be on the verge of tears (I was still working then).