My Doctor Tells Me, I Have Arthritis On Forefinger And Told Me To Exercise The Finger. I Have Done That For The Past Three Weeks. The Pain Sometime Can Be Severe And My Finger Is Now Slightly Bend And Swelling. Is There A Cure For This?

For any inflammation, the best thing to do is to take NSAIDS.  (Non-steroidal anti-inflammatory medications.)  These include Motrin, Aleve etc.  You can't take one dose and get a good outcome, these meds need to have a therapeutic level in your system.  That means that you need to take them, as directed, for longer periods of time.  Slowly the inflammation should subside and your finger will feel better.  Good luck.