In our daily life, we often hear that lumbago, weakness, leg and foot weakness, intercourse can not be “kidney deficiency”, have to eat “six flavor Dihuangwan” Chinese medicine to kidney; also heard of chronic nephritis, uremia is “kidney disease “. So “kidney deficiency” and “kidney disease” in the “kidney” is the same thing? The kidney in “kidney deficiency” refers to the “kidney” in the five internal organs of Chinese medicine, while the kidney in “kidney disease” is defined in Western medicine according to human anatomy and physiology, pathology “The two are not exactly the same. The anatomical position of the kidney and the physiological view that “kidney is a urinary organ with endocrine function” described by Western medicine are different from the Chinese medicine view that “kidney is the master of water”, “kidney is the master of bone and marrow” and “kidney collects essence and essence produces marrow”. The view that “the kidney collects essence and essence produces blood” is basically consistent. The difference is that many functions of the kidney in Chinese medicine are beyond the scope of kidney functions in Western medicine. 1, the kidney collects essence Chinese medicine believes that the kidney has the physiological function of storing and sequestering essence. The essence stored in the kidney is the “innate essence” which comes from the reproductive essence of the parents, and the “acquired essence” which is produced after birth by the body’s intake of nutrients from diet and metabolism of the five organs and six bowels. Kidney essence can be transformed into kidney energy, resulting in two major effects: 1, the kidney is the main growth, development, reproduction: after birth, people begin to grow taller, teeth, hair; puberty produces “heavenly sap”, with the ability to reproduce; young and strong period of hard bones, muscle development, full of energy are the result of the body’s kidney energy continues to fill up. As we age, kidney energy gradually decreases, people begin to look withered and old, hair loss, tooth loss, the function of various organs gradually decline; when the kidney energy is exhausted, the life expectancy of people will also end. The kidneys are the main source of yin and yang for the whole body: the essence of the kidneys contains two substances with opposite functions: kidney yang and kidney yin. kidney yang has the function of promoting the body’s warmth, movement, excitement and gas, while kidney yin has the function of promoting nourishment, moistening, tranquility and restraint. Moreover, the deficiency of the yin and yang of the kidney will affect the deficiency of the yin and yang of other organs. Chinese medicine summarizes the manifestations of mental depression, sluggish reaction, pale face, cold fear, cold limbs, cold Yin, low reproduction, weak and slow pulse as “deficiency of kidney yang”, and the manifestations of empty brain and soft bones, emaciation, hot flashes and night sweats, tinnitus and astringent eyes, dry throat and mouth, dry red tongue and fine pulse as ” Yin deficiency and Yang hyperactivity”; the deficiencies of Kidney-Yang and Kidney-Yin are treated accordingly by warming the Kidney and strengthening Yang and nourishing Yin to benefit the Kidney. 2, the kidney is the master of the Qi The kidney has the role of helping the lungs to maintain the depth of inspiration and prevent shallow breathing. Breathing is certainly a function of the lungs, but the descending of inhalation depends on the help of the nourishing function of the kidneys. According to this theory, Chinese medicine commonly uses the method of tonifying the kidney and nourishing qi to treat patients with wheezing who have superficial breathing, difficulty in inhaling, and shortness of breath when moving. 3, teeth as the standard of the kidney Chinese medicine believes that “the kidney is the master of bone, the teeth are the remainder of the bone”, the growth and strength of the teeth are dependent on the nourishment of the kidney essence. Clinically, the delayed growth and replacement of teeth in children and the loose and early loss of teeth in adults are often related to the deficiency of kidney essence. The application of kidney tonic method is often effective in treating dental lesions. The health care method of knocking on the teeth to fix the kidney also originates from this theory. Chinese medicine believes that the hearing of the ear cannot be sharp without the nourishment of kidney essence. If the kidney essence is deficient, tinnitus and deafness, dizziness and unsteadiness will occur. In the elderly, hearing is often diminished because the kidney essence is gradually declining. 5, the kidneys are open to the two yin 1, the front yin is the orifice of the kidneys: the urethra and the male penis and testicles belonging to the reproductive system, the female vagina, etc. are the orifice of the kidneys, so Chinese medicine believes that reproductive function is also regulated by the kidneys. In the anterior yin, the symptoms of urination, urinary incontinence, urination, spermatorrhea, premature ejaculation, impotence, etc. can all be caused by the kidney’s pathology. 2, the anus is the orifice of the kidneys: the function of the kidney’s solid storage of feces to the anus, so that it does not play an important role in uncontrolled discharge. If the kidney yang is insufficient, the spleen and stomach are not warmed, it is easy to have early morning diarrhea – “five night discharge”; kidney yin deficiency, the large intestine is not moistened, can also appear dry stools, anal fissures, etc. 6, the kidney in the will for fear five organs correspond to five emotions, the kidney and fear, fear-related. Fear to nourish the body’s kidney gas can not be spread upward and downward, that is, “fear is gas down”. Sudden extreme fear can make people “scared pants”, and even “shit and urine flow”; intercourse, sudden panic can make men impotent, women amenorrhea, which is the cause of fear of kidney injury. 7, the kidney in the liquid for saliva The liquid of the kidney, through the foot Shao Yin kidney meridian, reaches the Jin Jin and Yu Liquid two points under the tongue, secreted out, for saliva. In the clinic, patients with dry syndrome have reduced saliva secretion, and those who belong to kidney yin deficiency can be treated with the method of nourishing kidney yin. The method of swallowing saliva to nourish the kidney is also derived from this theory. In summary, Chinese and Western medicine have common understanding of the kidney as a urinary organ with endocrine function. However, the difference lies in the fact that the function of the kidney in Chinese medicine also involves the reproductive system, respiratory system, digestive system, mental and emotional organs, as well as the ear and teeth, so the function of the kidney in Chinese medicine is greater than the function of the kidney in Western medicine.