Keep fingers moving. Immediately after surgery it's important to keep your fingers moving with your wrist in a neutral position (not bent backward or foreward). Try doing this several times an hour while awake for the first 24 hours. Movements should be slow and full - fully extend the fingers straight and fully flex them into the palm, but without gripping tightly.
Ask your surgeon! Different hand surgeons offer divergent opinions on this--some splint the wrist and advocate "rest" during healing; others use a light wrap or no bandage and allow gentle movement to reduce swelling and enhance function. (i like the latter.) follow your surgeon's advice, for it is s/he you will ask to advise if you develop difficulty while healing.