1, cause infertility Bacterial vaginitis can easily infect the uterine cavity upstream, causing tubal infection and pelvic inflammatory disease, which can cause infertility. 2, affect fetal development Female vulvar ulcers can be caused not only by lesions of the vulva itself, such as vulvar inflammation and malignant tumors. Many diseases can cause vulvar inflammation, such as non-specific vulvovaginitis, herpes simplex virus infection, soft chancre, venereal lymphogranuloma, syphilis, vulvar tuberculosis, and leukoaraiosis, etc., and vulvar ulcers may appear during the development of these diseases. About 1/3 of vulvar cancers also present with vulvar ulcers at the early stage of the lesion. Therefore, vulvar ulcers are mostly the manifestation of systemic diseases in the vulva, especially some sexually transmitted diseases have vulvar ulcers as the first symptom. During pregnancy, bacterial vaginitis can endanger the fetus, causing fetal movement and even premature birth and miscarriage. Bacterial vaginitis, accompanied by vulvar itching, can cause a lot of inconvenience and impact on women’s life and work, and can also affect the life of couples.