FWIW, I would suggest seeing a physio rather than a doctor. I had a trapped nerve in my back which was causing a lot of pain and some mobility problems. Dr’s attitude was “Your back hurts? Take these painkillers, then it won’t.” Not very helpful, physio was much more use, and you get a little longer than 5 mins for a consultation.
Would also advise coming off any tablets as soon as possible. I was on codine, which made the pain go away but also made me very sleepy and completely useless at any mental arithmetic/puzzles, etc. More to the point, if the pain was hidden I would tend to overdo things, bit like Mrs WCA. It will hurt more in the short term to come off the tabs, or at least reduce them, but it means she will know when enough’s enough and when she needs to stop and have a rest.
HTH.
DISCLAIMER. I am not even slightly qualified in anything close to medecine…