This section compares man's yang to the sun in the sky. The sun of the sky can make the celestial bodies run endlessly, nourish everything by transpiration, and make everything grow and collect; Human yang has the functions of resisting external evils, protecting life and promoting the life activities of the body. The operation of the five internal organs and the gasification of body fluids depend on the warmth and promotion of yang. It can be seen that Yang plays a leading role in human life activities. This view of attaching importance to yang has influenced later physicians and become the theoretical origin of the school of warming and reinforcing. Zhang Jiebin, a physician in the Ming Dynasty, put forward in his book "Seeking the Right Record with the Wing of the Sutra" that Tianbao is just a red sun; Man's great treasure is just a true yang qi (compared with the theory of great treasure in the attached sutra)

1. Physiological function of Yang Qi.

(1) Yang spirit has the characteristics of upward and outward, and has the functions of resisting evil spirits and defending against external evil spirits. At the same time, the essence of yang qi nourishes the heart, while softness nourishes the tendons, suggesting the warming and tonifying effect of yang qi. Strong yang can make people smart and full, and their muscles are soft and elastic.

(2) The rising and falling law of yang in day and night. Yang-qi has the law of germination and ups and downs in day and night, and personal Yang-qi is closely related to the changes of Yin and Yang in nature. It is suggested that people should adjust their daily life with the changes of yin and yang in nature, so as to keep the yang abundant and prevent diseases.

2. Pathology of Yang Qi (1) Yang Qi is abnormal in exterior and exterior, and exogenous pathogens invade, so cold pathogens are easy to hurt Yang Qi, so the first theory holds that it is due to cold; Summer heat is yang evil, which is easy to damage qi and body fluid. Pathogenic heat is abundant in the body, sweating leads to asthma, and deficiency leads to mental dystrophy and unconsciousness. Damp-evil is heavy and turbid, yang is depressed, and clear yang does not rise, so the head sinks, the damp-evil turns into heat, and the tendons and veins remain, so Yang Can is not warm, so it is either clonic or flaccid; Wind easily causes edema on the head and face. If the pathogenic wind, cold and dampness alternate into diseases in summer, and the yang is repeatedly damaged, the yang can be exhausted.

(2) Exhaustion of yang, hyperactivity and decline of yang, inflammation due to deficiency of fire, loss of yin essence, and loss of yin essence due to summer heat, which may lead to sudden syncope. Its clinical manifestations include syncope, deafness and blindness. The disease is critical, with sudden onset, loss of yin and essence, and hyperactivity of yang.

(3) Anger caused by Yang Qi's disorder can lead to qi disorder, blood rising with qi, and qi-blood imbalance, leading to emaciation. In addition to sudden syncope, its clinical manifestations can also see sequelae such as relaxation of tendons and collaterals and hemiplegia. The initial symptom of this disease is stagnation of qi and blood.

(4) Yang Qi is partial to Yang Qi, so it can't warm the whole body. It is partial to one side, showing sweating on one side and no sweat on the other side, which may lead to partial limb paralysis and disuse.

(5) Yang Qi's abnormal opening and closing, depression and fumigation, or lingering pathogenic factors will lead to various diseases, such as acne, rickets, fear, fright, carbuncle and malaria.

(6) Yang Qi obstruction, Yang Qi in one place, the condition is critical. When there is an urgent need to disperse the real fire and dredge Yang Qi by purging, you can save the day. 1. the relationship between yin essence and yang qi

(1) interact and depend on each other.

"Yin people are eager to hide their essence, while Yang people defend themselves from the outside." Yin is storing essence, and it constantly rises and supplements Yang; Yang Canbao protects the body surface, resists external evils, makes the body compact, and protects the normal metaplasia of yin essence. "Su Wen Yin and Yang should be like a big theory" says, "Yin is inside, Yang keeps it, Yang is outside, and Yin makes it." If the relationship between Yin essence and Yang Qi is destroyed, the solitary Yang will not be born and the solitary Yin will not last long. Clinically, there are pathological changes of "Yang impairing Yin" and "Yin impairing Yang".

(2) mutual restriction

"When the yin is stronger than the yang, the pulse is thin and crazy; If yang cannot overcome its yin, the five internal organs will struggle without knowing it. " It is pointed out that the relationship between yin and yang is mutually restrictive, with excess of yang and deficiency of yin, and excess of yin and deficiency of yang.

(3) Yin and Pingyang are the secret, and the spirit is the cure.

Harmony between Yin and Yang is the best state of all things' own movement. It shows that yin and yang interact with each other in the state of mutual growth and decline and remain stable. For the human body, the secret of Pingyang of Yin and Yang is the guarantee of health. Therefore, health preservation must be based on "Chen Yin and Yang" in order to achieve "harmony of tendons and veins, solid bone marrow, harmony of qi and blood" and "harmony of internal and external, harmlessness of evil, agility of eyes and ears, and unchangeable qi"

2. Pathology of disharmony between Yin and Yang

Yin does not go up to yang, while yang goes up to heat, which may lead to thready pulse and madness. Yang does not go up to its yin, and yin is used by things, but when you see the five internal organs competing, you know nothing. If the yang is extremely high, it will lead to the separation of yin and yang, and the essence is absolutely necessary.

3. The leading role of Yang Qi in the balance and coordination of Yin and Yang

The relationship between Yin and Yang is mutual utilization and interdependence. The balance and coordination of yin and yang is the guarantee of health, but in the process of balance and coordination of yin and yang, yang plays a leading role. Therefore, the article emphasizes that "Yin and Yang are heavy, and Yang is dense" and "Yang is not dense, and Yin is absolutely absent", which fully embodies the academic thought of attaching importance to Yang in Neijing. 1. Five flavors of diet are transformed to nourish the essence of five internal organs.

"Yin gives birth to five flavors", the five flavors of diet are transported through the decomposition of spleen and stomach, which are subtly distributed throughout the body, play a nutritional role, and also enter the five internal organs to generate the essence of the five internal organs. As Su Wen's "Theory of Five Zangs" said: "The stomach is the sea of water and valley, the source of six fu organs, and the five flavors are hidden in the stomach and nourish the five zang organs." The five internal organs control the storage of essence without diarrhea, so it is called "Yin five palaces".

2. Five flavors hurt the five internal organs and yin essence.

Eating disorder and excessive five flavors can also be an important reason for damaging the essence of the five internal organs. Yin and Five Palaces are injured by five flavors, which can not only directly hurt the stomach and affect the five internal organs, but also cause pathological changes of related organs due to preference for five flavors, and then affect other organs. The pathogenic situation of excessive five flavors mentioned in this paper includes not only excessive qi in the internal organs, but also squeezing and insulting other organs to damage the internal organs. The specific situation depends on the specific physiological and pathological relationship between the five internal organs.