sport doctor

good evening, I am looking for a good doctor who understands sport related injuries and is interested in finding the roots of the problem rather than cashing 600 HKD every week and prescribe physiotherapy and inflammatory pills. I have had a pain in my buttock and left leg for the past 3 months. I had a MRI and was told it was a disc inflammation and that everything should be back to normal with a rest, a bit of medicine and some physio cessions. I have stopped running and replaced it with swimming and bike as advised but no big evolution on the pain though. Seems now that the next step is an anti-inflammatory injection in my spine…As I am a bit sceptical about the diagnosis and the remedy (as I didn’t manage to get more than 10’ with the doctor and still wasn't explained how I got injured and why an injection would definitly solve the problem where pills didn't), I am looking for a second medical advise. Not running and not understanding hurts me more than the pain ☹. Can anyone recommend a good doctor preferably on HK side? Thanks in advance for your help Olivier (who desperately wants to run again)