The cause of knee spurs is not completely clear, the main factor is due to degenerative changes in articular cartilage, in addition to some external forces, such as trauma or infection, is also the cause of knee spurs. 1. As the human body ages, the proteoglycans and other nutrients in the knee cartilage will gradually decrease, the cartilage will gradually lose its original elasticity, and the articular cartilage will be damaged, resulting in degenerative changes, which is the main cause of knee spurs. 2. Knee bone spur is also related to knee trauma, such as intra-articular fracture, meniscus injury and other causes, and this cause will accelerate the process of knee bone spur. In addition, excessive weight bearing and stress on the knee joint, such as obesity, long-term climbing stairs, mountain climbing and other factors can also lead to the formation of bone spurs in the knee, but also with infectious lesions of the knee joint, other inflammatory lesions such as autoimmune diseases and so on. In fact, knee bone spur is only an imaging clinical manifestation, long bone spur does not mean that it will cause knee pain and other discomfort symptoms, and the patient’s clinical symptoms are not directly proportional to the degree of knee bone spur, it is recommended that the patient consult the orthopedic department to decide whether it needs to be dealt with.