Yin deficiency and Yang deficiency mainly differ in symptoms, etiology and treatment. 1. Different symptoms: Yin deficiency refers to the deficiency of yin fluid in the body without the ability to control yang, the body’s nourishment, moistening and other functions are reduced. The main manifestations of Yin deficiency are heat (heat in the hearts of the hands and feet, and feeling hot in the heart and chest), night sweating (abnormal sweating after going to sleep and stopping sweating after waking up), etc. Yang deficiency usually refers to the deficiency of Yin fluid in the body, which is not able to control Yang; Yang deficiency usually refers to the loss of yang qi in the body, the role of the body’s warmth of the yang is reduced to cold limbs as the main manifestation of the cold symptoms. 2. Different etiology: Yin deficiency has various causes, such as daily over-service of warm and dry products, so that the dark depletion of yin fluid, emotional and emotional extremes leading to the internal growth of fire, and long-term injury to the yin essence, or uncontrolled intercourse leading to the depletion of yin essence, etc.; yang deficiency can be caused by living in a cold place for a long time, or over-service of cold, cold, clear and bitter products resulting in gradual depletion of yang energy, injury or yang deficiency due to prolonged illness. 3. Different treatments: Yin deficiency can be divided into liver, lung, kidney and other types of evidence, the treatment is also different, such as liver yin deficiency can be taken qi chrysanthemum dihuang pill, lung yin deficiency can be taken to nourish yin and clear the lungs pill, kidney yin deficiency can be taken to take zuo gui pill; yang deficiency can be divided into the spleen, kidney and other evidence, such as spleen yang deficiency can be taken to take the annexe li zhong tang, kidney yang deficiency can be taken to take right gui pill, and so on. If you have the above symptoms, you should consult a doctor in a timely manner, under the guidance of a professional physician to identify and treat the symptoms, and should not blindly use medication, so as not to cause damage to the organism.