I had one of these things that I think helped:
http://www.amazon.com/gp/product/B00...M7D0EEQF2WXCV4
As to the exercises, relief for me came from stretching the hand open against resistence. Therapists had a bucket of sawdust in which I put my hand in, while all fingers were together. Then when hand was in, I opened it as wide as I could.
Since I didn't carry a bucket of sawdust around me everywhere, I used a rubberband.
Put all five digits as close together as possible, wrap rubberband around digits, then open as wide as possibble over and over.
It felt good, and helped with pain relief.
Also, press hands together, as if praying. Fingers facing sky, palms pushing against one another. Then, keeping hands steady, raise elbows as high as possible.
Best of luck.