Skier’s Thumb, also known as Gamekeeper’s Thumb, is a condition that affects the ulnar collateral ligament (UCL) of the thumb, commonly resulting from a forceful hyperextension or abduction injury. This injury is often seen in activities like skiing, where the thumb is forcefully pushed away from the handgrip. Symptoms include pain, swelling, and instability in the thumb joint. Individuals with this condition may experience difficulty gripping objects or performing activities that involve thumb movement.