Women with cleft labia majora may be caused by vaginitis, allergy, vulvar injury, vulvar malnutrition, vulvar cancer and so on. 1. Vaginitis: Bacterial infection and other factors lead to vaginal inflammation and exudation of secretions, the inflammation stimulates the labia majora, resulting in the appearance of cleft labia majora. 2. Allergy: the use of sanitary napkin allergy, underwear quality is not good and other factors to stimulate the vulva allergy, resulting in the emergence of labia majora cracks. 3. Vulvar injury: inappropriate sexual intercourse makes the vulvar skin and mucous membrane abrasions and cracks, resulting in the appearance of cleft labia. 4. Vulvar dystrophy: it means that women’s vulvar skin and mucous membrane tissues are degenerated or the skin color is changed. This is a chronic disease. Clinically, vulvar dystrophy mainly manifests as itchy vulva, with local pain after scratching, and the lesion range varies in size, mainly affecting labia majora, and the color of the skin will be obviously lightened or whitened. 5. Vulvar cancer: manifested by long-term persistent vulvar itching, lumps, nodules and ulcers, which is more common in postmenopausal women and elderly women with long-term vulvar itching. If women have cleft labia majora, avoid scratching or washing with hot water, so as not to cause inflammation and infection. If the external lips are cracked and accompanied by localized redness, swelling and itching, you need to go to the hospital in time for treatment. You can wear loose and comfortable underwear, take a shower regularly, and pay attention to local cleanliness and hygiene.