When the knee joint bends, the ligaments around the joint are under tension, the contact between the entire joint surfaces becomes greater and the friction force between the joint surfaces increases, and injuries in these areas may produce pain. Examples include injuries to the medial joint ligaments, lateral collateral ligaments, injuries to the meniscus, wear and tear of the articular cartilage, chondromalacia patellae, osteophytes, and osteoarthritis. It is important to determine the specific treatment based on the nature of the specific injury that preceded the pain. If there is an obvious external injury, appropriate radiographs or MRIs need to be done, and if necessary, protection by external fixation with a brace, or surgical management. Bone proliferation, osteoarthritis caused by oral glucosamine, or intra-articular injection of sodium vitrate, together with acupuncture, massage, heat, physiotherapy, avoid wind, cold and other methods to help relieve symptoms.