It is a pathological phenomenon in which the Yang energy of the organism is deficient, the function is reduced or weakened, the metabolic activity is reduced, the organism is less reactive, and the Yang heat is insufficient. Most of the symptoms of Yang deficiency are cold symptoms. People have a balance of yin and yang, and if yang is insufficient, cold and damp symptoms will come up. The specific symptoms are as follows: 1. The fear of cold caused by imbalance of the body’s external guard, from the heart outward; 2. Heart Yang deficiency will have palpitations and palpitations, slow heartbeat, chest tightness and shortness of breath; 4. Spleen Yang deficiency when the stomach is colder, prone to diarrhea and fear of eating cold things; 5. Kidney Yang deficiency is mostly a reaction to the lack of Kidney Yang; and