Adults have 1.5-2 kilograms of microorganisms in their bodies. Yes, you read it right, that is, there are about 2 kilograms of microorganisms including bacteria, viruses, fungi and so on. I am not original, I remember academician Li Lanjuan said something similar in the CCTV program “Into Science” some years ago. These microorganisms mainly reside in the human body surface and the cavity connected with the outside world, and have no harmful effect on the human body, commonly known as the normal microbiota or normal flora. We all know that the microorganisms that live in the intestinal tract are beneficial and harmless to the human body, especially most of them are concentrated in the colon, which has a symbiotic relationship with us, digesting cellulose that we cannot digest and secreting amino acids or fatty acids. We provide the bacteria with a place to live and cellulose, and the bacteria provide us with fatty acids and amino acids. For a wound to clot, it needs a lot of vitamin K. Our body can synthesize it on its own, but it’s very inefficient, whereas the microbes in our body synthesize vitamin K much more efficiently than the body does, so the microbes in our body also help us to heal wounds. So it’s pretty clear whether dieters and non-medically necessary enemas are hurting or helping themselves! Our female lower genital tract is an open cavity, which is one of the important micro-ecological zones in the human body, and is normally a micro-ecosystem composed mainly of dominant bacteria such as Lactobacillus. As many as 29 species of microorganisms have been isolated from vaginal secretions, the most important of which is Lactobacillus, which has a high isolation rate of 50% to 80% in vaginal discharge specimens from healthy women. It has been determined that the microbiota colonizing the normal vagina consists mainly of bacteria, fungi, protozoa, and viruses, which inhabit the mucosal folds of the lateral walls of the vagina, followed by the vault, and partially in the cervix. There are always some people who misunderstand that bacteria and other microorganisms are bad, and always try to make their personal hygiene especially clean, and like to use the so-called health care lotion to wash the vagina again and again. Then these microorganisms living in the vagina will be swept out of the door, in fact, they are very wronged, because they are here, “good people” ah, have always been conscientious in maintaining the order of this place! The normal presence of Lactobacillus in the vagina plays a key role in maintaining the normal flora of the vagina, the role of Lactobacillus in the squamous epithelial cells of the vagina glycogen, decomposition into lactic acid, so that the vagina localized to form a weakly acidic environment (pH ≤ 4.5, mostly in the 3.8 ~ 4.4), which can inhibit the overgrowth of other parasitic bacteria. In addition, Lactobacillus prevents pathogenic microorganisms from adhering to vaginal epithelial cells through substitution and competitive exclusion mechanisms. At the same time, the secretion of hydrogen peroxide, bacteriocins, bacteriocins-like and biosurfactants inhibit the growth of pathogenic microorganisms, thus maintaining the balance of the vaginal microecological environment. A coordinated and balanced state is maintained between the host and the flora and between the flora and the bacteria. Factors such as estrogen level, menstruation, pregnancy and age will cause some subsequent changes in the vaginal microbiota, which fluctuate within the physiological range, favoring the host to adapt to the environment. Disease occurs when changes in the internal and external environment disrupt this balanced, harmonized state. The most common in the clinic, the most headache of mycosis fungoides vulvovaginitis, belongs to the endogenous disease. The causative agent is Candida albicans, a conditionally pathogenic bacteria, 10% to 20% of non-pregnant women and 30% of pregnant women have this bacterial parasitism in the vagina, but the amount of bacteria is small and does not cause symptoms. Only when the whole body and the vagina local immunity decline, especially the local cellular immunity decline, such as: sweet and fatty food intake, (will lead to vaginal epithelial glycogen content is too high, resulting in the lowering of the vaginal pH is conducive to the reproduction of molds); and unscientific health care products for the private parts of the proliferation of the use of excessive attention to hygiene douche vagina and the abuse of antibiotics will destroy the ecological balance of the vaginal microorganisms, thus leading to the reproduction of fungi related to. . Candida albicans reproduces in large quantities, which is what triggers the symptoms of vaginitis. With increasing age and the onset of aging, the acidic environment of the vagina is disrupted, causing a decrease in Candida albicans, Corynebacterium and Lactobacillus, while on the contrary an elevation of group B Streptococcus, Staphylococcus aureus and Escherichia coli in the vagina can also lead to menopausal vaginitis. The human body is a small universe, and the symbiotic relationship between microorganisms in our body and our body is the same as the relationship between us and nature. The world can only be a good place if we follow the way of nature and live in harmony with it.