I know what agony you're feeling.
I get tennis elbow, and carpal tunnel in both hands/arms from demolition work and constant hammering when nailing off decking.
Is your hand in any kind of traction/cast device, Wilso?
While nurofen and paracetamol never did jack shite for my pain, point-of-problem massage does offer some relief. Just enough to get back to sleep for a half hour or so.
Apart from that, go for the most alkaline diet you can put up with. Lots of lemon juice and honey in the morning, and cold-pressed vege and fruit juices all day. No cheese or milk, and no alcohol or caffeine. Green salads with your steak. Pass on the chips.
Might as well chop both hands off.