Clinical symptoms of knee osteoarthritis can be manifested as joint pain, joint swelling, limited joint movement and so on. 1. Joint pain: Knee osteoarthritis can be mildly manifested as a feeling of heaviness and fatigue in the knee joints, and joint pain can occur after long-distance walking. As the disease progresses, it may develop into pain upon activity, and it is difficult to relieve when resting. 2. Joint swelling: knee arthritis affects the synovial membrane hyperplasia to secrete excessive joint fluid, resulting in joint swelling and discomfort, and patients may experience joint swelling, soreness and discomfort. 3. Restriction of joint movement: early stage of knee osteoarthritis disease and mild pain joint movement restriction symptoms are not obvious, with the aggravation of pain, joint movement restriction becomes obvious, manifested as the knee can not completely straighten and flexion, can not squat and hold weight, and so on. The above symptoms of knee osteoarthritis should be timely to the hospital, under the guidance of the doctor’s clear diagnosis of the correct treatment, so as not to delay the condition.