Cold knees need to be treated according to the cause, which can be categorized into physiological and pathological causes, and the treatment includes general treatment, physiotherapy, medication and so on. 1. Physiological causes: cold knees simply due to the weather, only need to keep warm locally, you can apply hot compresses locally. 2. Pathologic causes: (1) Degenerative lesions: such as degenerative changes in the knee joint will make the blood circulation is not good, cold knees, etc., to less activity, more massage, hot compresses local, physical therapy, etc.. (2) Lumbar spinal stenosis: such as lumbar spinal stenosis can also cause abnormal sensation in the lower limbs, cold knees, etc., and it is necessary to pay attention to rest and keep warm. (3) Rheumatoid arthritis: patients with rheumatoid arthritis can also have cold knees, and can take non-steroidal anti-inflammatory drugs such as aspirin and ibuprofen. There may be other causes of cold knees, if the symptoms are not relieved after rest, it is recommended to go to the hospital in time. The above medications are recommended to be used under medical supervision.