Old cold leg is a folk term, in medical terms there is no old cold leg this disease. Old cold leg is due to the legs are afraid of cold, afraid of cold, encounter cold weather or in a cold environment, will lead to leg pain, leg numbness, leg cramps symptoms, caused by the above symptoms, generally have the following kinds of causes: 1, lower limb vascular disease: lower limb vascular atherosclerosis, arterial stenosis, arterial occlusion, etc., these lesions in the cold can appear in the lower limb artery contraction, ischemia, and lead to leg pain, leg numbness, leg cramps 2, other diseases: osteoarthropathy of the knee joint, or rheumatism, rheumatoid and other diseases resulting in arthritis, can also have legs afraid of cold, afraid of cold symptoms. Therefore, the old cold leg is a folk term, is the embodiment of disease symptoms.