The reproductive tract of normal women of childbearing age has a natural defense mechanism. Vaginal microecology is dominated by vaginal bacteria. Under the influence of vaginal bacteria, vaginal epithelium is constantly proliferating and rich in glycogen. With the help of vaginal bacteria, glycogen is decomposed into lactic acid. By maintaining vaginal PH at 4-5, pathogenic bacteria can be effectively killed or their reproduction can be inhibited. Because vaginal bacilli form a biofilm on the vaginal wall to protect it, although different microorganisms can often be seen in the vulva and vagina of normal women, they do not show inflammation in clinic. Generally speaking, among many gynecological diseases, candidal vaginitis and trichomonal vaginitis are the most common causes of female vulvar itching. Here are the reasons for this situation: 1, special infection: candidal vaginitis and trichomonal vaginitis are the most common causes of vulvar itching. Crabs and scabies can also cause vulvar tingling. 2, vulvar squamous epithelial cell hyperplasia: the main symptoms are vulvar tingling and itching, accompanied by vulvar skin whitening. 3. Drug allergy or chemical stimulation: soap, condoms, benzalkonium bromide, etc. It can cause contact or allergic dermatitis due to direct stimulation or allergy, and has symptoms such as vulvar tingling and itching. 4, bad hygiene habits: do not pay attention to the local cleaning of vulva, sebum, sweat, menstrual blood, vaginal secretions for a long time or urine, feces immersion, can cause vulva tingling and itching; Menstrual sanitary napkins, usually wearing airtight chemical fiber underwear, will induce itching due to local long-term damp and heat stagnation. 5. Other skin lesions: abrasions, warts, herpes, tumors, etc. Can cause vulva tingling and itching. Has displayed, slaughter? Bad birds, do you think this is a good idea? ┌ Residual? Ostrich crane d!