Repeated itching of the vulva can be seen in systemic diseases, vaginal diseases, pinworms, diabetes, as follows: 1, unexplained vulvar itching usually occurs only in women of childbearing age or postmenopausal women, jaundice, severe anemia, leukemia, as well as vitamin A, vitamin B deficiency, etc. can be caused by vulvar itching, often for the systemic itching of some of the manifestations; 2, repeated itching of the vulva combined with an increase in leucorrhoea, secretions, abnormal, foul smell when Consider vulvovaginal pseudomycosis, trichomonas vaginitis, bacterial vaginosis; 3, repeated vaginal itching combined with vulvar skin pigmentation loss consider vulvar intraepithelial neoplasia due to; 4, pinworms can cause vulvar itching to the night; 5, diabetic patients can be vulvar skin irritation, especially in patients with a history of vulvovaginal pseudomycosis vulvovaginal pruritus particularly serious.