Cold weather knee pain symptoms are common for the following reasons: first, knee synovitis, cold weather will make the knee joint cold, the synovial membrane in the knee joint produces sterile inflammation, can lead to knee pain, limited activity, after the heat, physical therapy, the symptoms will gradually alleviate, or even completely disappear, and will not leave sequelae. Secondly, patients with rheumatoid arthritis or rheumatoid arthritis may also experience knee pain in cold weather, and the cold may aggravate the inflammation, especially in the morning, when the joints are painful, but also accompanied by joint stiffness and limited joint movement. Therefore, care should be taken to protect the knee joint from cold weather to prevent painful symptoms in the knee joint.