Once the vulva itches at night, it is likely to be caused by vaginitis, commonly known as simple vaginitis, vaginal pseudomonal yeast disease, trichomoniasis, bacterial vaginitis, vulvar eczema, etc. During the day, because of distraction, the itching symptoms are obvious at night, and this situation needs to be treated accordingly after clarifying the cause. Common causes and treatments 1. Simple vaginitis: Patients who are often stimulated by menstrual blood, vaginal secretions, urine and feces and do not pay attention to keep the vulvar skin clean are prone to simple vaginitis, which mainly manifests as itching, pain and burning sensation in the mucous membrane of vulvar skin. Patients can use herbs to clear heat and detoxify, kill insects and relieve itching, such as Bai Xian Pi, Bitter Ginseng, Phellodendron and Serpentine in decoction and fumigation, which can appropriately relieve symptoms. 2. Vaginal pseudomycosis: mainly manifests as increased leucorrhea, beanbag-like, burning sensation in vulva and vagina, and can be accompanied by severe itching. Patients should use clotrimazole suppositories or nifurturing mycoplasma vaginal suppositories vaginally as prescribed by doctors. 3. Trichomonas vaginitis: manifesting as increased vaginal discharge and foul-smelling leucorrhea, the discharge can be purulent or grass green, and can be accompanied by vulvar itching or pain, painful intercourse, etc. Patients can use metronidazole, tinidazole, etc. for anti-infection treatment as prescribed by the doctor; 4. Bacterial vaginitis: mainly manifesting as increased vaginal discharge, leucorrhea with fishy odor and vulvar itching and burning, should be treated with anti-anaerobic drugs as prescribed by the doctor 5, vulvar eczema: is a variety of causes of metaplastic skin disease, mainly manifested as erythema, edema, papules, blisters gathered in groups, and accompanied by vulvar itching, patients should follow medical advice to use butyl flufenamic acid ointment to relieve symptoms; 6, other: pubic lice, pinworm infection, vulvar skin disease, vulvar dystrophy, vulvar fungal infection and some systemic diseases such as Other: pubic lice, pinworm infection, vulvar skin disease, vulvar malnutrition, vulvar fungal infection and certain systemic diseases such as diabetes can also lead to vulvar itching, and patients should undergo causal treatment under the guidance of a doctor. When the vulva itches, patients are not advised to scratch with their hands to avoid infection. You should pay attention to local cleanliness and hygiene, wash your vulva in time, change your underwear regularly, disinfect and sterilize your underwear regularly, and pay attention to your own hygiene and that of your partner before and after sex.