Cold feet are usually a sign of kidney yang deficiency. However, cold feet may also be caused by cold, insufficient qi and blood, etc. It is not possible to diagnose the disease based on a single symptom alone, and it is recommended that the patient go to the Department of Traditional Chinese Medicine in a regular hospital to be diagnosed by a professional Chinese medicine practitioner, and then adjusted and treated accordingly. Traditional Chinese medicine believes that yin deficiency generates heat and yang deficiency generates cold. When suffering from kidney yin deficiency, the lack of kidney yin often leads to internal heat, which is mainly manifested in symptoms such as heartburn (heat in the hearts of the hands and feet, and self-consciousness of the heart and chest), hot flashes (a burst of heat), night sweating (abnormal sweating after going to sleep, and sweating stops after waking up), soreness of the waist and knees, lack of strength in the limbs, and insomnia and sleeplessness. And patients with kidney yang deficiency because of kidney yang deficiency (lack of yang energy in the kidneys), can not warm the limbs resulting in the body’s internal birth of cold, mainly manifested as cold, cold limbs, pale, cold waist and knees, mental weakness, increased nocturnal enuresis and other symptoms, and men will also have a loss of libido, impotence and other manifestations. Therefore, cold feet are usually a manifestation of kidney yang deficiency.