You just need a standing desk. ;)

Magnesium soaks are brilliant for calming neuralgia (nerve pain-irritation) and yes, sciatica CAN be caused by inflammation and things like shingles. Mostly though it's simple nerve compression from poor postural habit. Over time we think it's 'normal' to sit or walk the way we do. Driving a lot can inflame it, as we don't hold our weight equally on both butt cheeks.

Believe it or not, sleeping position can really aggravate it too. If you lay on your side, tuck a pillow under your upper knee so the weight of your top leg isn't compressing the nerve tissue for 8 hours solid while you sleep.

Hit me up via DM if you need - I spent 6 years walking with crutches and had unbearable sciatic pain - these days I run, walk 99.5% normal and haven't had back or sciatic pain in 15 years. And I'm 55 years old. :) When it's really severe - HEAT and magnesium are the fastest circuit breakers, along with simple acupressure and stretching.