Normal leukorrhea test but itchy vulva may be due to specimen not taken well, urine stimulation, clothing allergy, atrophic vaginitis, etc., need to be analyzed specifically. 1. The specimen is not taken well: it may be that the patient has pathogen infection, but due to the operation process fails to take the specimen with pathogens, which leads to the appearance of normal leukorrhea test but itchy vulva. 2. Urine stimulation, clothing allergy: these cases are not caused by pathogen infection, but due to foreign stimulants leading to vulvar itching, usually leukorrhea is normal. 3. Atrophic vaginitis: due to the low level of estrogen after menopause, local resistance decreases, vulvar itching, vaginal secretion increases, and the secretion can not be detected in the phenomenon of pathogenic bacteria. If the patient has normal leukorrhea test but vulvar itching, it is recommended to consult a doctor in time, under the guidance of the doctor, improve the relevant examination, clarify the cause of the disease, and treat the cause of the disease.