Bone spurs in the knee do not necessarily require surgical treatment. A bone spur in the knee is actually a sign of a problem in the body’s joints that is self-replacing and self-repairing. There is a good side to bone spurs and a bad side to them. If the spur does not irritate the joint capsule or ligaments and cause severe pain and discomfort, surgery is not necessary. When the amount of bone spurs in the knee is so large that they fill the intercondylar fossa, the upper and lower poles of the patella and the periarticular area and interfere with the function of joint movement, surgery is considered, but surgery is often performed in the end stage of osteoarthritis of the knee. Surgery is not just a matter of clearing the spur, but also of arthroplasty, such as the more mature unicompartmental arthroplasty or total knee replacement, which involves removing the entire joint and all abnormal structures and replacing them with an artificial joint to improve the patient’s knee function, eliminate joint pain caused by the spur or synovial inflammation, and improve the patient’s quality of life.