The wrist is made up of two rows of bones, with four bones in each row. These bones are located near the hand and are called carpal bones. Then, the forearm contains two bones, the ulna and radius bones.
A smooth substance called articular cartilage covers the surface of the bones where they touch each other within the joint.
Common Causes of Wrist Pain
Osteoarthritis (OA) is sometimes called degenerative arthritis because it is a "wearing out" condition involving the breakdown of cartilage and bones. With osteoarthritis, the cushioning cartilage at the end of the radius and carpal bones may have worn down, making wrist movement painful as bone rubs against bone.
Post-Traumatic arthritis may develop after an injury to the wrist joint in which the bone and cartilage do not heal properly. The joint is no longer smooth and scar tissue develops. The scar tissue causes pain in the wrist joint.
Rheumatoid Arthritis (RA) is an autoimmune disease in which the body's immune response negatively affects the lining of the joints (called the synovial membrane), causing chronic inflammation and pain. The synovium becomes thickened and inflamed. In turn, too much synovial fluid is produced within the joint space, which causes a chronic inflammation that damages the cartilage. This results in cartilage loss, pain, and stiffness
Carpal Tunnel Syndrome can cause hand and wrist pain. The "carpal tunnel" is a narrow passageway that runs from the base of the hand through the wrist. The median nerve, which controls our sense of touch in the palm, and touch and fine movement in the thumb and three largerer fingers, passes through the carpal tunnel along with several tendons. If any of those tendons become irritated, or any other swelling encroaches on the space within the tunnel, the median nerve may cause symptoms that range from tingling in the fingers to pain radiating up the arm. Hereditiy, repetitive and foreceful hand use, hormonal changes, and other medical conditions like arthritis and diabetes, have all been linked to carpal tunnel syndrome.