Kidney is the foundation of congenital, which was first seen in "Doctors Must Read". Kidney is the innate foundation, and spleen is the acquired foundation. Congenital refers to the fetus when the human body is pregnant. "Decisive Gas" said: "Er Shen fights with each other and becomes one. Mr. Chang is called the essence"; Soul fulcrum The meridians also say: "Mr. Man, later essence, then brain marrow, bone dryness, pulse camp, stiff tendons, fleshy walls, hard skin and long hair." As can be seen from the above, "innate" refers to the essence of "two gods fighting" inherited from parents, and the innate qi produced by innate essence is hereditary and the origin of human life. In the process of individual life, being born before the body is the driving force for the formation of acquired viscera and the growth and development of human body. Kidney is innate, which means that the function of kidney is the basis for determining the strength of human innate endowment, the speed of growth and development, and the rise and fall of viscera function.

The kidney, located in the lower jiao, is the yin organ in the yin and has the function of storing essence. For example, Su Wen. In ancient times, the theory of innocence said: "Kidney governs water and hides in the essence of five internal organs". On the six Tibetan images, he said, "The kidney dominates the needling, and the essence is also sealed." Kidney storing essence has both innate essence and acquired essence. The innate essence hidden in the kidney is the innate foundation of the human body, which is inherited by parents and enriched the day after tomorrow. The content includes two aspects: First, the innate and living matter is the basis of human life activities, that is, the so-called "human beings begin to live, and then become essence" (soul pivot. Meridian "), and" life is called essence "("Lingshu ". The "essence" of this god. Second, it refers to the basic material of human reproduction, that is, the so-called "both men and women are fine, and all things are metaplasia" (Book of Changes), and "Er Shen fought and merged, and Mr. Chang called it the essence" (Soul Pivot). Deadly gas "). It can be seen that the innate essence is hidden in the kidney, and after birth, it is nourished by the acquired essence and becomes the basic substance of human reproduction, so it is also called "reproductive essence".

The acquired essence hidden in the kidney refers to the essence of five internal organs. It originated from the refined valley in the later period, and has the function of nourishing viscera and tissues, that is, the so-called "kidney controls water, and the essence of the five internal organs hides it." ("Su Wen. The innate essence in the kidney is closely related to the acquired essence: the innate essence always stimulates the acquired essence, and the acquired essence constantly nourishes the innate essence. The two complement each other and help each other to form the essence of kidney. The essence stored in the kidney is re-transported to other viscera according to the needs of the body, which becomes the material basis for the functional activities of viscera. In this way, diarrhea appeared in Tibet, and it was hidden again, endlessly. As "Yi Tang and San Ji" said: "The kidney is hidden in the essence of the five internal organs, so the five internal organs can be vented, and the essence is hidden in the kidney and not born in the kidney. The essence of the internal organs, the kidney is actually hidden, is leaking. When it is drained, the essence of the internal organs will continue, so it will be the second and the north, and it will be given to the heart, full and then overflowing, and the way of life. "

Kidney storing refined qi is the source of vitality and the motive force of vitality activity. It has the functions of promoting human growth and development, promoting human reproductive function and resisting the invasion of foreign evils, so it is called the foundation of the day after tomorrow. Such as "book compilation". "Nourishing Kidney Law" records: "Kidney is the lowest among the viscera, and it is better than water. It is the foundation of life and the root of life. "

Kidney is innate, which emphasizes the important role of kidney in human growth and reproductive function. This function is mainly reflected in: 1. Promoting human reproductive function. Kidney essence is the original substance of human embryo development and plays a role in determining the rise and fall of reproductive capacity. After a person is born, the kidney essence gradually fills up, and the viscera tissues grow and develop. In adolescence, the kidney essence is full, and the gonads mature with the arrival of Tiangui, but men see nocturnal emission, and women's menstruation comes on time, with mature sexual function and strong reproductive ability; When people reach old age, kidney essence is gradually deficient, tiangui is gradually reduced, and sexual function and reproductive ability are gradually reduced. Just like "Su Wen". The ancient naive theory said: "A woman ... has a son because she is 27 years old. ..... On July 7th, the pulse was weak, the pulse was too weak, and the day was exhausted, so it was impassable, so it was bad and childless. Men ... 28, kidney qi, heavenly stagnation, essence and diarrhea, yin and yang harmony, so you can have children; ...... Seven or eight points, exhausted, kidney failure, excellent health. "

Second, promote the growth and development of the human body. The essence in the kidney has strong vitality. With the rise and fall of the essence in the kidney, the life activities of the human body show regular changes in birth and aging. For example, Su Wen. The ancient theory of innocence said: "the woman is seven years old, full of kidney qi and longer teeth;" ..... notoginseng, kidney qi is general, so real teeth are born and long; 47. Strong bones and muscles, extremely long hair and strong physique; On may 7, Yangming's pulse failed, the face began to burn and the hair began to fall; Sixty-seven, Sanyang pulse declines in the upper, the face is burnt, and the hair begins to be white; On July 7, the pulse is weak, the pulse is weak, and the sky is exhausted. Male, eight years old, full of kidney qi and teething. Twenty-eight, the kidney is full of gas, the sky is full, and the essence overflows ... Eight or eight, the teeth are gone. " It can be seen that kidney qi is the driving force of growth and development. When the kidney qi is sufficient, the growth and development are normal, the teeth are solid and shiny, the bones are strong, and the viscera function is normal. Deficiency of kidney-qi, slow, soft and late growth and development, or tooth loss, premature aging, and decreased visceral function. As Li Zhongzi said, "When a baby is born, it has two kidneys first. Without this body, there are two kidneys first, so the kidney is the root of viscera, the root of twelve veins, the root of breathing and the source of triple energizer. Therefore, the innate foundation lies in the kidney. " ("Medical records must be read. Medical theory ")

Third, resist external evils and prevent diseases. The essence in the kidney can not only promote human growth and reproductive function, but also protect the body and prevent the invasion of evil spirits. Soul fulcrum "Stabbing the True Evil" said: "Those who are really angry are subject to heaven, and those who are covered in it are also harmonious." The true qi is the real Yuan Qi of human body. It is a combination of innate essence, natural essence and water valley essence, in which the essence in the kidney plays an important role. Therefore, if the kidney essence is sufficient, it will be full of vitality, strong body and strong disease resistance; If the kidney essence is insufficient, the yuan is really insufficient, and the body is weak, which is easy to cause disease. Therefore, Su Wen. The golden chamber said: "The essence of the husband is the essence of the body. Therefore, those who hide sperm will not get sick in spring. " Sun Simiao also said: "If you have less essence, you will get sick, and if you have exhausted essence, you will die." Young and strong people are full of kidney essence, so they are healthy and less sick; Teenagers or the elderly are sickly, because kidney essence and kidney qi are insufficient, and their ability to resist evil spirits is weak.

The theory that kidney is the foundation of nature has important guiding significance for the treatment of diseases. Clinically, the methods of tonifying kidney and replenishing essence can not only treat children's weakness and stagnation, toothache in the elderly, impotence and premature ejaculation in young and middle-aged people, or amenorrhea and infertility caused by insufficient kidney essence, but also enhance human resistance and prevent diseases through the methods of nourishing health and replenishing essence. In recent years, in the study of chronic bronchitis, it is found that patients with chronic bronchitis are most likely to be complicated with infection, which makes their condition worse; Kidney-warming drugs can improve the immune function of patients with kidney-yang deficiency, regulate humoral immunity and prevent and treat chronic bronchitis.