Thumb and wrist supports can be very useful in the treatment of sports injuries. But you can also use them for accidental injuries and workplace demands. Common conditions that thumb and wrists splints can help with include carpal tunnel syndrome, tendonitis and repetitive strain injuries. They can also be used for a sprained wrist or broken wrist. Or for fractured scaphoids, Colles fractures, fractured radiuses and fractured ulnas. Repetitive movements of the wrist and fingers can lead to overuse injuries. Supports and splints can help to help to prevent overloading.