Cold knees can be considered from the following two aspects: 1. It is possible that the problem is a deficiency of qi and blood. Because the lack of qi and blood will cause the blood metabolism to slow down. In addition, the low temperature causes vasoconstriction, so the blood will be insufficient, will also feel the knee cold; 2, autonomic nerve function regulation disorder or not smooth, will also feel the joint cold. To prevent cold knees, first of all, you can do more exercise, more running, there is a tai chi and other exercises that are good for joint stretching, you can do more to promote blood circulation in the joints, making the autonomic nerve more smoothly, improve the symptoms of cold joints.