A little itchy vulva common diseases are allergic dermatitis, trichomonas vaginitis, mycosis fungoides and bacterial vaginosis, etc., the patient should consult a doctor in a timely manner, under the guidance of the doctor to apply medication such as benadryl, montelukast, clotrimazole, metronidazole and so on. 1. Allergic dermatitis: the material of the underwear can cause allergies in the vulva, allergens invade the body through the skin caused by local symptoms, the patient will have local itching, rash and burning, you can take benadryl, montelukast, and secondary infections can be amoxicillin and so on. 2. Mycotic vaginitis: Candida infection of the vagina caused by inflammatory diseases, patients will have varying degrees of vulvar itching, leukorrhea tofu-like, vulvar redness and swelling, pain during sexual intercourse, etc., can be taken through the ketoconazole, miconazole and vaginal topical application of clotrimazole suppository for treatment. 3. Trichomonas vaginitis, bacterial vaginosis: a mixed infection caused by dysfunction of the normal flora in the vagina, patients will have increased vaginal discharge, abnormal color with foul smell and vulvar itching, vulvar pain, can be treated by oral metronidazole, clindamycin and vaginal topical application of metronidazole suppositories and other drugs. Vulvovaginal itching may also be due to other causes, and should be promptly consulted to identify the cause and treated under the guidance of the doctor.