Yep, had the very same thing happen to my left hand about 11 months ago. I got to an occupational therapist right away and started soaking in Epsom Salts (103 - 105 degrees) four times a day for 15 minutes. Then in between the soaks, I kept my hand really warm by wrapping it in microwaved soft rice bean bags. The constant warmth, OT, and espom salts got my hand moving in about three days and it took another month of keeping it up to get about 70% movement back. Now, a year later I would say I have close to 90% back.

Good luck.