Knee osteoarthritis, rheumatoid and rheumatoid arthritis, traumatic arthritis, and viral and bacterial infectious arthritis are common, and the risk varies from disease to disease. This type of arthritis is caused by problems with the immune system, especially during the active phase of the disease, when the patient’s joints are swollen and painful. Internal medical treatment is definitely needed, because in this case, without it, the disease progression cannot be well controlled, which is likely to cause joint deformation and eventually disability. Arthritis left untreated or not treated with internal medicine will definitely have a very big impact. In the case of osteoarthritis, if it has been detected, it is important to take rest and pay attention to the correct walking posture, as well as to exercise more strength of the quadriceps. Surgical treatment is even required if it is severe.