Cubital tunnel syndrome happens when the ulnar nerve, which passes through the cubital tunnel is injured and becomes inflamed, swollen, and irritated. The Cubital Tunnel is a tunnel of muscle, ligament, and bone) on the inside of the elbow. Symptoms may include: weakness of ring and little fingers, decreased hand grip, claw-life deformities. Braces can support or limit range of motion to relieve these symptoms, depending on the level of injury/irritation.