Before you go on spending on Ergonomic what not setup. Try therapy. Google it first - kind of pain (sharp or constant ) you have , exactly where you have ( thumb side or ulnar side), what movements are restricted by affliction, is it nerves or muscle etc...spend sometime finding what you have. Consult doctor if you have to. Start therapy ...most of the time it's stretching/compressing exercise once or twice a day. You can easily see the improvements once you do therapy.

I recently suffered from ulnar entrapment syndrome ...googled it, watched videos, did suggested stretching for 2 weeks i guess. All healed.