Diagnosed with scoliosis as an adult?
Did you get diagnosed because you have chronic back pain?
Can you tell if one hip feels more limited than the other?
Does your body love leaning towards one side more than the other?
Is it easier to lunge on one side, cross one leg, or stretch one side better than the other?
When your pain began is not equivalent to WHEN the issues that CAUSED it started. Small shifts in the body over time are usually not painful, but you probably subconsciously realized how one side was 'off' from the other. Multiply that over years and the asymmetry becomes more noticeable as does your pain!
Best physical therapy practice incorporates MANUAL therapy performed ON you and ALSO habit/posture/lifestyle changes so you adapt methods that AVOID allowing your body to drift back into the same patterns that promote pain to return.