Vulvar ulcers can be caused by diseases such as vulvovaginitis, vulvar cancer, vulvar tuberculosis, or other diseases such as Crohn’s disease. 1: Vulvovaginitis: vulvovaginitis is caused by pathogen infection or various physical and chemical factors. Patients show itching, swelling and erosion of the vulva, which can lead to symptoms of vulvar ulcer. 2. Vulvar cancer: Vulvar cancer is caused by human papilloma virus infection, vulvar sclerosing moss and other factors. Patients will have symptoms like itching, pain and ulceration of vulva, which will lead to vulvar ulcer. 3. Vulvar tuberculosis: vulvar tuberculosis is caused by the invasion of mycobacterium tuberculosis into the organism, and the patient mainly manifests proliferative nodules, ulcers, and difficulty in urination. Therefore, patients with vulvar tuberculosis will have symptoms of vulvar ulcers. 4. Other: Crohn’s disease, acute leukemia, disseminated discoid lupus erythematosus and other diseases may also lead to symptoms of vulvar ulcers. Patients with symptoms of vulvar ulcers should consult a doctor to find out the cause of the disease and follow the doctor’s instructions for treatment.