I have severe hand/wrist pain. How can you recover from computer related injury?

YES. Don't waste you money! see your doctor or a hand specialist first to see what you've got first! if you have truly severe pain, you probably have a very treatable problem. Be aware that in the internet age we often blame our computer for our hand problems, but it's not really true.
Local support. You need emf guard - many are available the cheap one is trionz and the expensive ones are qlinkproducts. The electro magnetic field disruption increase pain perception. Local support with capsaicin patch and kinesio tapes will help, try also brace for hands and wrist.