Thats too bad about the kidney, as NSAIDs are good at reducing inflammation. You might also try topical creams (I like theragesic). Getting heat into the joint can reduce the swelling some also. One of the hallmarks of bursitis is if you can move a joint one way and it doesn't hurt and it hurts like the dickens to move it another way. That is usually a sign that the swollen bursa sac is pinching a nerve when the joint rotates a certain way. If it is just painful to move no matter what you do, then it may be something other than bursitis.