Redness and pain in the vulva may be related to vulvovaginal pseudomycosis, trichomonas vaginitis and vulvar eczema. 1. Vulvovaginal pseudomycosis: caused by pseudomycetes, it usually has tofu scum-like leukorrhea, strong itching, and in severe cases, it can lead to chafing, redness, swelling, and pain in the vulva, which are particularly obvious. 2. Trichomonas vaginitis: caused by Trichomonas vaginalis, which is an infectious disease, manifested as yellowish-green foamy leukorrhea, which will cause symptoms of vulvar itching, redness and pain. 3. Vulvovaginal eczema: it may be due to the underwear is not breathable or vulvar hygiene environment is poor and other reasons, caused by the vulvar skin eczema, some may appear small blisters, can be manifested as vulvar redness, pain and other phenomena. Vulvar redness and pain can also be seen in other causes, it is recommended to consult a doctor in a timely manner, follow the doctor’s instructions for relevant examinations, with the help of the doctor to clarify the causes, and targeted treatment or therapy.