Osteoarthritis of the knee is a disorder based on degenerative pathological changes. Its occurrence is usually caused by degenerative lesions of the knee joint, trauma, and overexertion. In addition, excessive weight, improper walking posture, prolonged squatting, and cold exposure of the knee joint are also causes of knee osteoarthritis. Knee osteoarthritis mostly occurs in middle-aged and elderly people and is the main cause of leg pain in the elderly. The symptoms are mostly knee pain, pain in going up and down stairs, soreness and discomfort in the knee when sitting up and walking. Knee stiffness and coldness are also among the symptoms of knee arthritis. Patients may also exhibit swelling, popping, and fluid accumulation, which can cause joint deformity and difficulty walking if left untreated. In the knee joint area also often suffer from knee synovitis, ligament damage, meniscal damage, knee free body, popliteal cyst, patellar tenderness, goose foot bursitis and other joint diseases. Treatment 1. The key to treating knee osteoarthritis is to prevent further cartilage wear, protect the cartilage, and reduce synovial reactions and exudation. These include oral medications and intra-articular injections of sodium vitrate, which promote cartilage synthesis, inhibit the breakdown of articular cartilage, and also have anti-inflammatory effects. Oral and intra-articular injections are safe and effective. 2. Arthroscopic treatment of knee osteoarthritis involves placing an optical endoscope, through the joint space, into the joint cavity and displaying the lesion site and weave 4 to 6 times magnified on a monitor, using tiny tools to repair joint cartilage and clean the joint cavity. Prevention Prevention of knee osteoarthritis still needs to be done in daily life, avoiding long hours in one posture, not to mention blindly repeatedly flexing and extending the knee joint, rubbing and pressing the patella; paying attention to the prevention of cold and dampness, keeping warm, and avoiding excessive strain on the knee joint; minimizing up and down steps, and other exercises that make the knee joint flexion and weight-bearing, in order to reduce the wear and tear of the joint cartilage. In clinical work, knee osteoarthritis is also the most common, with a large number of patients attending outpatient clinics.