Joint degeneration is caused by two factors: First, age. As we age, all organs degenerate, and the joints are no exception. When the joints degenerate, there is significant wear and tear on the articular cartilage, which leads to significant damage to the bursa, muscles and soft tissues surrounding the joint. This is reflected in the narrowing of the joint space, the deformity of the joint and the formation of bone superfluity on X-ray, which can be manifested as pain, deformity and obvious limitation of movement of the joint. Second, trauma, such as joint fracture, early joint degeneration after fracture healing, also known as traumatic arthritis. In this case, early joint pain can occur, and the joint can show obvious osteophytes, narrowing of the joint space, or joint deformity when taking x-rays.