Wrist pain

Hi

I have been suffering recently from wrist pain, It started last week then stopped for around 5 days then yesterday I woke up with pain in my left  rest that resolved with heating and diclofenac gel, today I woke up with pain in my right wrist that resolved with diclofenac and came back after few hours. I can move my wrists in all directions and there is no swelling or signs of inflammation, not visible at least. What could cause the pain?

Regards