Early symptoms of knee arthritis include joint pain, joint stiffness, and joint swelling. 1. Joint pain: It mostly occurs around the knee joint after long walks or strenuous exercise. The pain can be relieved by rest. Some will have a ringing sound when flexing and extending the knee joint. Squatting activities are limited. 2. Joint stiffness: long time in a fixed position or joint stiffness in the morning, symptoms can be relieved by appropriate activities. 3. Joint swelling: synovial membrane hyperplasia and secretion of fluid will appear different degrees of joint swelling. When the above situation occurs, we should pay attention to the maintenance of the knee joint, reduce the weight of the knee joint, pay attention to joint warmth. If the pain and swelling are obvious, go to the hospital for further treatment.