The thumb is at risk for a number of injuries including a sprained thumb, because of the role of the thumb in gripping and holding sports implements in sports as well as its location in the hand. One of the more common injuries to the thumb is an injury to the ulnar collateral ligament ligament on the inside of the thumb at the proximal or first joint. The thumb is unique from the fingers in its anatomical structure. While the fingers have three phalanges small bones and two joints proximal and distal interphalangeal joints , the thumb only has two phalanges and one interphalangeal joint.
Sprained Thumb: Symptoms and Treatment | The Hand Society
A sprain is an injury to a ligament, which is a soft tissue that connects bones to each other at joints. The most common ligament to be injured in the thumb is the ulnar collateral ligament. This helps connect the thumb to the hand on the side near the index finger. It allows the thumb to act like a post. The radial collateral ligament is on the other side of the thumb.
Many times, thumb sprains will result from sports injuries or falls. For example, skiing results in many thumb injuries, as does basketball. Or, you may fall and try to catch yourself, bending your thumb in an awkward position. To determine the severity of your injury, visit a hand surgeon as soon as possible. He or she may take x-rays to see if any bones are broken.