Itchy odor under the body of a girl may be caused by vaginitis, poor hygiene habits, systemic diseases, such as diabetes and other factors. 1.Vaginitis: (1) Vulvovaginal pseudofilamentous yeast disease:Vulvovaginal itching symptoms are obvious, severe fidgeting, more obvious at night. (2) Trichomonas vaginitis: Trichomonas anaerobic fermentation of carbohydrates, producing putrid gas. (3) Bacterial vaginosis: due to anaerobic bacteria producing amines, the secretion has a thin fishy odor. (2) Bad hygiene habits: such as often do not wash the vulva, do not change underwear, easy bacterial infection, resulting in itching under the body odor. 3. Systemic diseases: such as diabetes. Diabetic patients urinary sugar on the vulvar skin stimulation, can cause vulvar itching. Pay attention to the vulva itching do not scratch with your hands, so as to avoid vulvar ulceration. When abnormal symptoms appear, you should consult a doctor in time to find out the cause of the disease and carry out effective treatment.