Cracked labia may be caused by acute injuries, infectious factors, vulvar malnutrition and other factors. 1. Acute injury: riding straddle injuries or greater force during sex will lead to female labia vulvae cracks, which may also be accompanied by pain, swelling, bleeding and other abnormal manifestations. 2. Infectious factors: women do not pay attention to vulvar hygiene, may induce vulvovaginitis or vaginitis, due to inflammatory substances stimulation, will lead to vulvar labia fissures, accompanied by vulvar itching, vaginal itching and other abnormal manifestations. 3. Vulvar malnutrition: it may be related to vulvar moisture, chronic infection, endocrine abnormality and other factors, in the initial stage, there will be vulvar itching, vulvar color change, and after aggravation, it will lead to the appearance of cracks on the lips of the vulva. Women with cleft vulvar lips are advised to seek medical examination and treatment to avoid delay in treatment.