Subluxation in middle finger middle joint and tendonitis

I've got an old sports injury that has been diagnosed as a subluxation with mild arthritis…I also have tendonitis in both hands due to misuse of my hands. My hands hurt all the time and I use a pain relieving cream which helps but doesn't alleviate the pain. I did see a orthropedic and he suggested freezing the joint in place so it wouldn't move…I have really good movement of the joint so I hate to do that…I do have a lot of swelling underneath the last segment of the finger joint that connects to the hand so it makes it impossible to make a fist. This has been going on for the last five years or so. Any advice is appreciated. Thanks!