Recently going thru wrist and hand pain not sure if it is using computer mouse a lot or hand arthiritis? what is the best treatment? it hurts in wrist joint while folding hand or lifting please advise treatment, any ointment or exercise?

If there is no sign of inflammation (warm, red and swelling), inflammatory joint disease is less likely. You should stop or reduce the activity which exacerbates the pain or discomfort, take Ibuprofen (Motrin, Advil) 200 mg x 2 (OTC med) every 6-8 hours as needed for 1-3 days then resuming the activity at a slow pace. You should see a doctor if there is sign of inflammation for a correct diagnosis

Carpal tunnel is a possibility among many others. Having your wrist and hand examined in order to have your condition properly diagnosed and wearing a brace/splint may help.