I avoid oral NSAIDs as I'm prone to excess stomach acid. Am using topical ibuprofen on it, ice, and I've got a tubular support for now.
Am having it assessed tomorrow to see what else to do. Swelling and redness have reduced a bit, but it's still about the same level of pain: as long as I keep it still, it's fine, but any movement of the wrist towards the thumb is a problem.