Bleeding labia may be caused by trauma, vaginal inflammation, and vulvar tumors. 1. Trauma: such as riding straddle injuries, can lead to labia majora injury, causing labial bleeding, hematoma formation, pain and other symptoms, combined with the history of diagnosis is easy. 2. Vaginal inflammation: such as vulvovaginal pseudomycosis, mainly manifested as increased vaginal discharge and vulvar itching, gynecological examination can see redness and swelling of the vaginal mucosa, redness and swelling of the inner labia minora, and even erosion and superficial ulcers, bleeding, etc., which can be diagnosed by combining with the clinical manifestations and examination of vaginal secretion. 3. Vulvar tumor (1) Benign vulvar tumor: such as vulvar papilloma, mostly located in labia majora, manifested as vulvar swelling with itching symptoms, and there will be ulceration, bleeding and infection, which need to be excised under the guidance of doctor and sent to pathological examination. (2) Vulvar squamous cell carcinoma: the main symptoms are itching, localized lumps or ulcers, which are mostly found in labia majora and labia minora, etc. Combined with infection or advanced cancer, pain, bleeding and oozing may occur. The combination of history, clinical manifestations and pathologic examination may assist in the diagnosis. When labial bleeding occurs in the clinic, it is necessary to go to the hospital and find out the cause as soon as possible and treat it actively.