Hand and wrist fractures usually occur as a result of a fall onto the hand. Some cases of hand injury happen as a result of striking a hard object, such as a wall, door, or another person. These are among the most common fractures a person can have.
The wrist is made up of several bones. It is a joint created by the connection of 8 small bones in the wrist itself and two forearm bones, called the radius and ulna. All of these bones come together to make several small and a few large joints. Because the small bones are so small and often globular in shape, they rarely fracture. The most commonly fractured bones in the wrist are the larger radius and ulna, and the smaller navicular bone in the wrist.