A cracked vaginal opening may be caused by improper sex, excessive exercise, vulvar malnutrition, vulvar and vaginal inflammation. 1. Improper sex life: If the sex life is improper, too hard or too rough, the vaginal damage caused by the vagina, may lead to the situation of vaginal opening cracked. 2. Excessive exercise: If a woman exercises too much in her daily life, such as splitting the fork, it may cause the vaginal opening to crack. 3. Vulvar malnutrition: Vulvar malnutrition decreases the elasticity of the local skin of the vulva, which may result in vaginal fissures, accompanied by whitening of the vulvar skin and vulvar itching. 4. Vulvar and vaginal inflammation: If the patient suffers from vulvar and vaginal pseudomycosis, the patient often manifests vulvar itching, abnormal vaginal secretion, accompanied by vulvar dryness, vulvar and vaginal fissures, and so on. Patients with vaginal fissures should go to the gynecology department of regular hospitals in a timely manner, and under the guidance of professional doctors to carry out targeted therapeutic measures.