Good question.
I've been paying privately to see a massage therapist for the muscle spasms associated with a very old herniated disk injury. It helps get them relaxed and if they've not been in spasm for too long, the relief can last weeks. Otherwise, it's every week.
My GP issued me naproxen. Which isn't OTC here, so it's good they did write a script for it. Their other suggestion was a stronger pain med, which I don't want. What I need is PT, but apparently naproxen is going to be it from the NHS.
Good luck with it, Margo - hope you feel better soon~