Most of the vaginitis is due to the decline of body resistance and not paying attention to pubic hygiene, which leads to the infection of pathogens such as trichomonas, mold or bacteria, and then inflammation occurs. In addition, some triggers are also prone to cause the disease, such as frequent douching of the vagina, frequent sexual intercourse, pregnancy, excessive fatigue and so on. 1. Pathogenic bacteria infection, not paying attention to vulvar cleanliness and hygiene, or not paying attention to hygiene during coitus, which leads to pathogenic bacteria entering women’s vagina from the outside, resulting in vaginal inflammation, especially bacterial vaginitis and trichomonas vaginitis. 2. Decline in vaginal defense function, the normal vagina has its defense function, such as the vaginal acidic environment, the vaginal wall before and after the tight post, etc., but if you often over douche the vagina, so that the acidic environment declined, leading to the entry of pathogenic bacteria caused by infection. Frequent sexual intercourse will also destroy the vaginal defense function. 3. Decrease in body resistance, such as women’s pregnancy tends to decline in body resistance, vaginal glycogen content increases, easy to induce mycosis vaginalis. Women who are usually overworked, stay up late and so on, will also lead to a decline in resistance, induced vaginitis.