In reply to dakidunn:
Gentlemen, Thank you very much for the replies, info and insight. I have an appointment to see a shoulder specialist in February. My doctor made the appointment suggesting the specialist would be able to locate the exact issue using a higher resolution ultrasound scan.
The same referring doc did my first cortisone injection which worked very well. It almost instantly stopped the pain and rather stupidly, I started climbing too soon and of course the problem came back. When it did, I had an ultra sound guided cortisone injection. This highlighted some inflation to the tendons and bursa, but luckily no tears, bone spurs or ruptures. This time the jab didn't have such an instant effect. Sadly repeat injections, I understand can lead to ruptures/tears, so I'm thinking more jabs are not an option for a while.
I have actually been doing yoga foundation pose practice for about a year and a lot of core stability exercises for a couple of years before that. Sadly, those excellent exercises had taken a bit of a back seat to climbing and on your suggestions I am going to restart and get my posture back to how it should be.
I have found a very effective stretch for the tight chest muscles involving a shoulder blade squeeze etc. Above everything, this seems to be having a big positive effect. I had been doing the theraband stretches and lifts etc but I think because of the underlying problem, this was doing more harm than good. Once the chest is stretched a bit I hope to be able to resume this, which I will do daily from then on.
Thanks again for the tips chaps, I hope we all don't get too much more crocked and get back onto the rock again soon.
Best wishes and thanks again,
Mark