I am out of action at the moment. I have a hip impingement which has been going on for a quite a while. I've seen all the great and good in the London hip scene (pardon the pun) and have continued my yoga practice the best I can whilst working around the injury site and not taking myself into a point of pain. A recent stint which had me sat at a computer for more hours than I care to count has aggravated the impingement and the steroid injection I had in August has started to wear off.
One of the problems I now have is pain and inflammation causes muscle inhibition. As I currently have pain, I have been advised to rest to see if the pain subsides. Continuing to work through the pain inhibits the muscles around the injury site and stops them from working efficiently; therefore doing more damage than good. Once I am relatively pain free, I will work the muscles (in this case the glutes and other core stabilisers) in isolation to try and gain back the strength that has been lost around the pain site. So the old saying "no pain, no gain" definitely does not apply to injuries. It might be worth remembering this if you are practising with pain and inflammation, as you may be adding to the problem.