I was suffering with this a couple of weeks ago which cleared up a week ago but has reared it's ugly head again. Doc gave me Naprosyn and said to take over the counter painkillers. Hot water bottles also help.
If mine continues I will revisit the Docs but hopefully not. Mine just seems concentrated down my right leg.
I had the same sort of thing Hedge. It started as Back ache first. A real niggling pain, which then started to turn into bad kidney pain.
Hot water bottles helped loads on my back/kidney area, but I remember having a terrible night.
Then it decided to turn into the most horrendous groin pain which then led to thigh/quad pain.
I was a mess from my right hand side lower back to my right kneeā¦.and it lasted days.
Now I'm already on enough opiates to make a horse collapse, but I was instructed to take more as and when I needed them. I was eventually (almost) pain free, but I was living like a smacked up Zombie for 3days