A good treatment for many musculoskeletal injuries is the rice protocol: rest, immobilize, cold, elevate.
Don't use it, keep it still (splints help this), ice it and keep it elevated. If it doesn't get better, it's better to take a wrist injury to the doctor sooner rather than later to prevent complications. There are lots of ways to fracture
a wrist that might not be apparent without an exam.
Answer assisted by David Miller, Medical Student