The causes of cold calves and feet are modern medical aspects, Chinese medicine aspects, as follows: 1, modern medicine: mainly due to the nerve root of the sciatic nerve, the sensory nerve inside is stimulated and compressed, the nerve has anterior and posterior roots, after mixing into a nerve root, if it is a lumbar disc herniation or pear-shaped muscle syndrome, it will compress the mixed nerve, there is a sensory nerve inside, the patient will have abnormal sensation, always 2, Chinese medicine: the cause of cold calves and feet is mainly Yang deficiency, kidney Yang deficiency, spleen and kidney Yang deficiency, because Yang deficiency can not warm the extremities, so the patient will appear cold calves and feet, feel during the examination, will feel the patient’s toes or the back of the foot, plantar skin temperature decreased, manifested as cold.