Hi May
You can focus on yoga poses to help you, but actually you can do some counter-movement hand stretches during your day.
You can:
>> Interlock all your (8) fingers and push your palms away from you. You know, the way some people stretch out their knuckles.
>> Press your fingers (not your palm) into the desk or counter-top, while you’re standing, cantilevering your hand. You lean into your fingers.
>> Sit on the floor and arm behind you, (such as in Ardha Matsyendrasana, Spinal Twist) press your hand into the floor.
That should get you some movement and stretch back and realign your connective tissue much more favourably than the coiled up, tight feeling you most likely have at the moment!
Namaste
Gabrielle 🙂