The TENS machine

It is now four weeks since the surgery and I am starting to feel better. The irritability of my hand is still there however and I get CRPS pain about twice a day, early morning and especially at night. I am using a TENS machine to alleviate the pain. My wrist is still quite stiff, I have good rotation but limited wrist extension towards the forearm, this prevents certain types of movement; the hand surgeon and therapist do not think this will improve.