The left foot is always cold in traditional Chinese medicine may be due to the weakening of yang qi, cold evil guest surface, heat evil internal depression and other reasons. 1. Weakness of yang qi: when the patient because of physical weakness, kidney yang qi insufficiency; or because of vomiting diarrhea, resulting in yang qi storm off; or due to trauma caused by hemorrhage, qi with blood off, etc., may also cause the patient’s left foot cold phenomenon. 2. Cold evil guest table: if the patient due to the cold attack on the skin, its main manifestation of cold evil, the main collection of attraction, the nature of the stagnation, the skin outside the Yang Qi can not enter, be blocked, is also one of the causes of the patient’s left foot cold. 3. Heat evil internal depression: when the patient’s body heat evil, congestion of qi, so that Yang Qi can not reach the human body’s limbs, will also cause the performance of the patient’s left foot cold. It is important to note that if the patient appears to be always cold left foot performance, you should go to the hospital in a timely manner to find out the cause of the disease, active treatment, so as not to delay the condition.