The wrist consists of eight bones called carpals. They surround a tube called the carpal tunnel, which has tendons and a nerve inside.
Everyday activities like typing, writing, racquet sports or gardening, as well as a number of disorders such as diabetes, arthritis, or osteoporosis, can cause pain in the wrist. A common cause of wrist pain is carpal tunnel syndrome, where swelling in the wrist tightens around the nerve.
However, the most common cause of wrist injury results from a fall onto an outstretched hand. The impact usually bends the wrist back toward the forearm, which can stretch the surrounding ligaments too far. This can cause small or complete tears of the ligaments.