Osteoarthritis is mainly a progressive loss of articular cartilage, hyperplasia of joint edges, and formation of bone fragments. Slow joint pain, stiffness, swelling, deformation, and restricted movement. 25-30% of people aged 45-64 years have osteoarthritis, and 60-90% of people over 65 years have significant osteoarthritis. The main symptoms are: swollen and painful joints, joint deformation, and impaired movement. Changes in the joints are caused by wear and tear of the joint cartilage, the surface becomes rough and uneven, and the pieces of cartilage that are removed by friction fall into the joint cavity causing inflammatory reactions and even affecting joint movement. The first step is to control weight-bearing activities, walk less, go up and down stairs, and do less squatting activities. Quadriceps exercises, physical therapy, and medication are also available. Peri-articular closure and intra-articular injection of sodium vitrate can also be performed. Arthroscopic surgery has the advantages of less trauma, less pain, and faster recovery, and is most often performed on patients who are younger and have significant pain symptoms and joint hinge symptoms. For patients with advanced osteoarthritis, artificial joint replacement surgery should be considered to completely cure the disease, the main purpose of which is to reduce pain, improve function and enhance quality of life.