We are combining it with a strategy of hand reflexology (vids on YT) core strengthening exercises, stretches and cold packs. Be careful with the stretches though, some people do not have any idea, so make sure the advice is coming from a physiotherapist not some random. For example, any bending over e.g. the meaning of yoga pose, or the runner's stretch will exacerbate the sciatica. The nerve does not really want to be stretched.

The exercises should be more subtle than that.

The core strengthening includes walking on the balls of the feet slowly, creeping like a cat, so that one is aware of balancing, rather than quickly plonking on the heels. Walking seems to help in the dire hours.