In the article “Why the more you wash, the more you wash”, it is mentioned that many women always think they have leukorrhea, they think they have inflammation, they like to use “pads”, they also like to buy some “care solution”, “cleaning solution” to wash the vulva and rinse the vagina. “The individual women also use their fingers wrapped in a towel to scrub into the vagina, in order to completely remove the leucorrhea, the beautiful name: “health care”, but the leucorrhea is not only not clean, but the more you wash, the more. The more you wash, the more you wash, and the more bacteria you “wash” into your vagina, the more unclean you are, the more unclean you are, forming a strange circle of female “cleansing”. It is true that many women who like to clean their vaginas fall into this circle and end up seeking treatment from gynecologists in hospitals because of the serious vaginitis that affects their daily life. In my clinical work, I am often asked by patients: I have repeatedly had vaginitis, and I have been treated by many doctors in many hospitals. “The more I wash my vulva and vagina, the more itchy it gets! Why is this? After the author examined the patient, she determined that the patient was using the medication inappropriately and then told the patient that she should stop using the medication in her vulva and vagina. After a period of time, the more she washed, the more itchy her vulva became and the itching never happened again. The following is a detailed explanation of why the vulva becomes more itchy with each wash: “Why does the leukorrhea become more and more itchy with each wash? In the article, it is mentioned that a healthy human body is because there is a sound defense system in the body to resist the invasion of various external pathogenic factors at all times, and there is also a balanced ecological environment in the body to keep all physiological and psychological activities in the body under relatively constant conditions. The combination of these two is the body’s immunity. The opening of the vagina is connected to the outside world, and the external substances entering the vagina can enter the pelvic and abdominal cavities through the uterus and fallopian tubes. The vagina has a defensive barrier, which is the ecological environment inside the vagina. The balance of the vaginal ecosystem must be maintained in order for the vagina to function as a barrier. The vaginal ecosystem is composed of the vaginal flora and the immune system (immune antibodies, white blood cells, etc.) and is in balance. In a healthy person, the balance of the vaginal ecosystem is like an interlocking chain; if one of the links is disrupted, the balance is out of whack and the vaginal barrier is destroyed. Estrogen, Lactobacillus and vaginal pH play an important role in maintaining the vaginal ecological balance. Under physiological conditions, estrogen thickens the vaginal epithelium and enriches it with glycogen, increasing its resistance to pathogens. Glycogen is broken down by Lactobacillus vaginalis into lactic acid, which maintains an acidic environment (pH 3.8-4.4) in the vagina and inhibits the growth of other pathogens, which is called “vaginal self-cleaning”. In addition to maintaining the acidic environment of the vagina, the hydrogen peroxide produced by Lactobacillus is coordinated with the anti-microbial factors secreted by the vaginal wall and cervical canal to inhibit or kill other bacteria or microorganisms that multiply excessively. Long-term application of antibiotics can inhibit the growth of Lactobacillus, or when the immunity of the body is low, other bacteria and microorganisms can multiply in the vagina and become dominant, which is a conditionally pathogenic bacterium causing vaginitis. Thus, maintaining the ecological balance in the vagina itself is a natural defense against infection. Blindly using medication to wash the vulva or douche the vagina will not only bring pathogenic bacteria into the vagina, but also change the normal pH of the vagina, disrupting the normal vaginal flora distribution and causing inflammation of the vagina. Vaginitis and cervicitis should not occur. Why do you blindly use “health”, “disinfection”, “cleaning” pads or “health” pads for a long time? Why is it that after a long time of blindly using “health care”, “disinfectant”, “cleaning” pads or “health care” and “cleaning” solutions, vulvovaginitis is not cured but the vulva and vagina are always itching and uncomfortable? The normal skin pH is between 5.0 and 5.6, and there is an acidic film on the surface of the skin that prevents and inhibits the growth of bacteria and pathogenic bacteria, and protects and moisturizes the skin. The pH value of different parts of human skin also has a slight difference. The more the skin of the parts that secrete more oil, the lower the pH value, close to pH 5.0, for example, the skin of face and limbs; on the contrary, the skin of the parts that secrete less oil, the drier the skin, the higher the pH value, more alkaline, close to pH 5.6, for example, the skin of chest, abdomen and vulva. pH value is high, the skin is easy to aging, but the skin in places with low pH is prone to skin sensitivity and itching. Fortunately, the skin on the face and extremities, where humans have evolved over a long period of time and are now exposed to the most intense UV rays from the sun, are areas with a lower pH level and are less prone to aging. Therefore, the pH of the best “cosmetics” for the face and limbs is set between pH 5.5 and 7.0, so that it is suitable for the oily, low pH skin of the face and does not easily cause aging of the skin of the face. The vulvar skin, which is not exposed to UV rays from the sun, has a low pH and is dry, so that it does not feel uncomfortably oily and moist all day. The pH of normal female vagina is between 3.8 and 4.4, because in this pH environment, it is most suitable for the proliferation of Lactobacillus in the vagina, and at the same time, the vaginal mucous membrane cells secrete more glycogen for the growth of Lactobacillus, while other parasitic condition-causing microorganisms are inhibited, thus forming a virtuous cycle. Thus, the vaginal environment of normal women is “self-cleaning”. However, a change in the pH of the vagina makes it very susceptible to invasion by external microorganisms or the proliferation of conditionally pathogenic microorganisms in the vagina, resulting in vaginitis. For example, Trichomonas vaginalis thrives in a humid environment with a pH of 5.2-6.6, but not in an environment with a pH below 5 or above 7.5. The pH of water is between 6.8-7.0. If you douche your vagina with water, the pH in the vagina will rise from about 4.0 to over 5.2, which is very suitable for Trichomonas to grow and reproduce. Trichomonas consumes or engulfs glycogen in the vaginal epithelium, which prevents lactic acid production and raises the vaginal pH. Therefore, in trichomoniasis patients with a vaginal pH of 5.0-6.5, doctors use acidic potassium permanganate solution or acetic acid solution to douche the vagina in order to lower the vaginal pH and inhibit Trichomonas reproduction, and also use methotrexate to kill Trichomonas. Another example is that pseudomycetes (Candida, mycobacteria) are suitable for proliferation in the vagina at pH 4.0-4.7 (usually less than 4.5). In addition to the external infection, Pseudomonas can also live in the vagina, intestines and mouth, and once the conditions are suitable for reproduction, it can cause infection and disease. When the vagina is repeatedly douched with a douche solution (e.g. “health”, “science” or “cleaning” solution with a pH of 3.5 or 4.0), the pH of the vagina changes (acidity increases), which is conducive to the development of vaginal infection. The increase in acidity favors the growth of pseudomonal yeast. During pregnancy and prolonged elevation of blood sugar (diabetes), the increase of glycogen in the vaginal tissues and the increase of acidity are conducive to the growth of pseudomonal yeast. Prolonged application of various antibiotics inhibits the growth of Lactobacillus in the vagina, which facilitates the growth of pseudomicrobial yeast. Long-term use of “pads” (especially “pads” with drugs), wearing tight chemical fiber thick underwear and obesity can increase the local temperature and humidity of the pubic area, which is suitable for pseudomicrobial yeast to multiply and cause infection. Pseudomonal yeast easily multiplies in the vagina, which is rich in glycogen and acidic, and when pseudomonal yeast infection occurs, it is easy for multiple pathogenic microorganisms to occur at the same time. Therefore, in cases of pseudomicrobial (Candida and mycobacterial) vaginitis, the doctor will have the patient wash the vulva with a sodium bicarbonate solution and wipe the vagina with a saturated sodium bicarbonate solution to raise the pH of the vagina to inhibit the growth of pseudomicrobial yeast and place medication for mycobacteria in the vagina. Bacterial vaginosis is a mixed infection caused by dysbiosis of the normal flora in the vagina. It is a decrease in the number of hydrogen peroxide-producing Lactobacilli in the vagina and a proliferation of other bacteria, mainly anaerobic bacteria such as Gardnerella, Bacteroides actinomycetemcomitans, Bacteroidetes, Streptococcus digestiveus and conditionally pathogenic bacteria such as Mycoplasma, causing an increase in vaginal discharge (leucorrhea) with a fishy odor and no obvious itching. As the lactobacilli in the vagina are reduced or even completely inhibited and cannot grow, the pH level in the vagina increases, with a pH between 5.0 and 5.7. Therefore, doctors use anti-anaerobic drugs (e.g. metronidazole) and macrolides, which (especially metronidazole) do not affect the growth of lactobacilli, but only inhibit the growth of anaerobic bacteria and mycoplasma, and are the more desirable treatment drugs. By inhibiting the growth of anaerobic bacteria and mycoplasma and at the same time making lactobacillus the dominant bacteria again, then the pH in the vagina gradually returns to the normal pH range and the vaginal defense barrier is re-established. According to the quality monitoring department, the pH value of “feminine care lotions” currently produced at home and abroad is between pH 4.0 and 4.5. Some of the quality “health” and “care” lotions are set at pH 3.5, others at pH 4.0, and some at pH 4.5. You should pay attention to the pH value when choosing them to avoid improper use. If you use a pH 3.5 solution for a long time when the pH of the vagina is normal, the pH of the vagina decreases and the acidity increases, which is conducive to the growth of yeast and the formation of mycosis fungoides. If a pH 4.5 solution is used for a long time to wash and douche the vagina with a normal pH, the pH of the vagina rises and the acidity decreases (alkalinity increases), which inhibits the growth of Lactobacillus and favors the growth of conditional pathogens in the vagina, resulting in bacterial vaginosis. It is worth mentioning that the pH value of human skin (including the skin of vulva) is between 5.0 and 5.6, while the pH value of the mucous membrane on the inner side of the labia minora and the mucous membrane around the urethra to the vaginal opening (that is, the mucous membrane of the vaginal vestibule) is about 5.0. If the pH solution is used for a long time, it will not only wash away the protective oil and acidic film on the surface of the skin and mucous membrane, but also make the local skin and mucous membrane lose their moisturizing and protective effect. Skin and mucous membranes with low pH caused by external washing solution are prone to skin and mucous membrane sensitivity, and also prone to vulvar skin and mucous membrane damage, resulting in “chapped” skin and mucous membrane itching. When the itching of the skin and mucous membranes occurs, the external washing solution is used again, because some solutions contain mint ingredients, so that people have a brief cool and pleasant feeling after washing, which stimulates you like to wash every day, do not wash uncomfortable, over time, like an addiction, the more you wash, the more itchy, the author often encountered in clinical work some patients who blindly use external washing drugs, even after stopping the external washing solution, some People in two or three months will have intermittent itchy discomfort, always want to use the external washing solution again to wash a comfortable. In fact, if you soak or wash the vulva with medication, the effect of the medication cannot enter the vagina and it does not work at all to treat vaginitis. This is because of the anatomy and physiology of the vagina. Although the vaginal opening is open to the outside world and can be invaded at any time, the front and back walls of the vagina are close to each other and “impermeable” to liquids. Even when swimming or diving, when the water pressure is very high, the water cannot be pressed into the vagina. If the water enters the vagina when swimming or diving, then the stomach will soon be full of water, which women dare to go swimming? Therefore, the drug of external washing cannot enter into the vagina, and washing is just a waste of time. If you don’t use the right medication, it will not only have no therapeutic effect, but also cause skin irritation and itching in the vulva. This is the reason why the more you wash your vulva, the more itchy it becomes. If itching occurs in the vulva or vagina, you must find a doctor to check what causes it and what germs are responsible for it, and then treat the symptoms in order to cure it. If you blindly wash yourself with medication, you will not only fail to treat or prevent the disease, but also give the pathogenic bacteria a chance to take advantage of it.