How does TCM explain the relationship between Yin and Yang?

When it comes to Chinese medicine, many people will have an idea that this is a group of Feng Shui gentlemen treating people. Because Chinese medicine always refers to the yin-yang and five elements to infer treatment when diagnosing diseases. This gives people a sense of pseudoscience. In fact, these are all misunderstandings about Chinese medicine. Let me introduce them today. Yin and Yang is an abstract concept. Huangdi Neijing said: "Yin and Yang are famous but invisible." Yin and Yang are everywhere, everything can be divided into Yin and Yang, and Yin and Yang can be divided into Yin and Yang, and they can be divided all the time. In Huangdi Neijing, the division between Yin and Yang once said: "Yin and Yang are counted by dozens, pushed by hundreds, pushed by thousands, pushed by tens of thousands, and countless others, but they want one." Yin and Yang are interdependent. Yin He not only represents opposing things, but also can be used to analyze two aspects of internal opposition. The original meaning of yin and yang is very simple, indicating that the sun is facing the sun, the sun is yang, and the back day is yin. Later, it was extended to the warmth and coldness of the climate, the up and down, the left and right sides, the internal and external directions, and the restlessness and tranquility of the movement state. Generally speaking, everything that is energetic, extroverted, upward, warm and bright belongs to Yang; Relatively static, defensive, healthy, cold and gloomy all belong to Yin. Yin and Yang are interdependent, and neither side can exist alone without the other. The upper part is yang, the lower part is yin, and it doesn't matter if there is no upper part; Heat is yang, cold is yin, and cold is no heat. The yin and yang attributes of things are relative. Under certain conditions, Yin can be transformed into Yang, and Yang Can can also be transformed into Yin. Yin and Yang are actually two contradictory aspects, which can be transformed, interdependent, ubiquitous and unified by opposites. This is a bilateral relationship. Application of yin-yang theory in traditional Chinese medicine 1. It shows that the human body is an organic whole, and the inside of the human body is full of the relationship of the unity of opposites of Yin and Yang. Therefore, Su Wenbaoming's Holography says: "Life is tangible and cannot be separated from Yin and Yang." All the tissues and structures of the human body are not only organically related, but also can be divided into two parts, yin and yang, which are opposite. The up and down, inside and outside, inside and outside, front and back, and the internal organs of the human body all contain the relationship of the unity of opposites of Yin and Yang. 2. Explain the physiological functions of the human body. According to the theory of traditional Chinese medicine, the normal life activities of human body are the result of harmony between Yin and Yang. If function is relative to matter, function belongs to yang and matter belongs to yin, the relationship between matter and function is the embodiment of unity of opposites. The relationship between human body function and matter, that is, yin and yang are interdependent. If yin and yang can't be used separately, human life will end. This is what Su Wen's Nu Tian Tong Lun said: "Yin Pingyang is the secret, and Qi is the rule; Yin and Yang are separated and refined. " 3. Explain the pathological changes of human body. The normal physiological activities of the human body maintain a relatively harmonious relationship between body matter and function. The occurrence of diseases and their pathological processes are all caused by yin-yang imbalance for some reason. The occurrence and development of diseases are related to healthy qi and pathogenic qi. Righteousness refers to the structure and function of the whole body, including the body's resistance to diseases; Pathogenic factors generally refer to various pathogenic factors. Both righteousness and evil can be distinguished by yin and yang. The interaction and struggle between them can be summarized by the imbalance of yin and yang (that is, the imbalance of prosperity and decline). Under certain conditions, pathological phenomena caused by imbalance of yin and yang can be transformed in the opposite direction, that is, yang syndrome can be transformed into yin syndrome, and yin syndrome can be transformed into yang syndrome. For example, people with severe internal heat should of course belong to yang syndrome, but if the heat reaches a certain level, their hands and feet may get cold (called heat syncope in Chinese medicine); People with yang deficiency and severe cold in the body will have a certain degree of fever, irritability and blushing. 4. For the diagnosis of diseases, because the internal cause of the occurrence, development and change of diseases lies in the imbalance of Yin and Yang, any disease, although its clinical manifestations are complex and changeable, can be summarized by Yin or Yang. In Su Wen's theory of correspondence between Yin and Yang, it is said that the first task of a doctor with high diagnostic level is to determine where and why Yin and Yang are unbalanced. In the aspect of syndrome differentiation, although there are eight categories of TCM: yin, yang, exterior, interior, cold, heat, deficiency and excess, yin and yang are the general categories of the eight categories, and exterior, excess and heat belong to yang; Internal deficiency and cold belong to yin. Yin He is big or small. If it is big, we can sum up whether the whole disease belongs to yin syndrome or yang syndrome. If it is very small, we can analyze the specific pulse conditions in the four diagnoses. Regardless of looking, smelling, asking and cutting, the first task should be to distinguish between yin and yang. Only by mastering the nature of Yin and Yang Can can we correctly distinguish Yin and Yang in syndrome differentiation. It is used for health care and treatment. Su Wen Zhi Zhen Da Lun records: "Adjust it according to the position of Yin and Yang, so as to balance the period." In other words, whether a doctor sees a doctor or gives health care to others, the fundamental purpose is to carefully analyze the imbalance between yin and yang, so as to adjust the body to achieve the balance between yin and yang. Yin-yang theory is used to guide the treatment of diseases, one is to determine the treatment principle, the other is to summarize the performance of drugs. The theory of Yin and Yang can be used to guide health preservation and treatment, and its principle can be determined. Yin and yang prevail, that is, one side of yin or yang prevails, and the evidence is more than enough. Because yang wins as yin disease and yang wins as heat, excessive yang heat is easy to damage yin fluid. Too much yin leads to yang disease, and too much yin leads to cold, which makes Yang Qi vulnerable. If yin or yang is superior, and its counterpart does not constitute a virtual loss, the method of "making up for the excess loss" can be adopted. If the other party is weak, it should take into account its shortcomings and cooperate with the method of supporting yang or benefiting yin. Excessive yang leads to heat, which belongs to excess heat syndrome. Cold-cooling drugs should be used to limit yang qi and treat heat with cold, that is, "heat leads to cold" Yin is superior to cold and belongs to cold syndrome. It is necessary to limit yin with warm drugs and treat cold with heat, that is, "cold is heat." Because both of them are empirical, the principle of this treatment is called "more damage than strength", that is, "diarrhea in reality". For example, Yang Tai's business is hot and fire, so forsythia, chrysanthemum, lotus plumule and even coptis and rhubarb should be used to clear away heat and diarrhea; If the shade is too strong, it will get cold. Clove, dried ginger, fennel, pepper and even aconite and cinnamon should be used to warm the interior and dispel the cold. Yin and Yang is a code name, which is relative. It is a classification method used to explain natural phenomena and human tissues. It can't be absolute, let alone arbitrary. The holistic view of the unity of man and nature is monism; Yin-yang theory is dualism, which talks about one-to-one bilateral relations. In fact, the conditioning, treatment and health preservation of traditional Chinese medicine are all based on the theory of relationship, regulating the relationship between man and nature, and between human internal organs and tissues.