The itchy red outside of the vagina is commonly caused by vulvovaginitis, different types of vulvovaginitis can be based on different types of choice of medication program, mainly including antibiotics, antifungal drugs and so on. 1. Non-specific vulvovaginitis: 0.1% povidone-iodine solution or 1:5000 potassium permanganate solution can be used in sitz baths under the guidance of a doctor, and antibiotic ointment such as erythromycin ointment can be applied locally for treatment. 2. Vestibular adenitis: levofloxacin, metronidazole and other anti-infective treatment can be selected, if necessary, take the local secretion to do bacterial culture to choose sensitive antibiotics. 3. Vulvovaginal pseudomycosis: local use of clotrimazole, miconazole ointment and other treatment, but also with oral antifungal drugs such as itraconazole, fluconazole and so on. After the above symptoms, it is recommended to go to the hospital in a timely manner for a clear diagnosis to take targeted treatment, to avoid blind use of medication, to avoid delaying the condition.