Heat in the hands and feet is usually seen in the yin deficiency deficiency heat, external heat, or yang sheng heat blazing internal solid heat, etc.. 1. Hand and foot heat, if the heart of the hands and feet is more hot than the back of the hands, mostly seen in Yin deficiency internal heat. It is accompanied by dryness of the throat, five heart-heat (heat in the heart of the hands and feet, and self-consciousness of the heart and chest), emaciation, redness of the cheekbones, hot flashes (a burst of heat), night sweating (abnormal sweating after going to sleep, and waking up to stop sweating) and other manifestations of yin deficiency. 2. Heat in the hands and feet, if the heat in the back of the hands and feet is more than the heat in the heart of the hands and feet, it is mostly seen in external fever. Mostly accompanied by cold (fear of cold) fever, head and body pain, red face, cough, sore throat and other external symptoms. 3. Hand and foot heat, if the back of the hands and feet, hands and feet of the heart are hot, mostly seen in the Yang Sheng heat blazing real heat evidence. Yang deficiency is generally manifested as cold hands and feet, so hot hands and feet are generally not due to Yang deficiency. Hand and foot heat diagnosis, for the judgment of the survival of Yang Qi, presumption of disease prognosis, guide the treatment of disease, etc., has an important significance, clinical diagnosis need to pay attention to the diagnostic value of hand and foot diagnosis, in order to make a more comprehensive diagnosis and treatment.