Vulvar burning sensation but no bacteria on examination may be mycosis vaginalis, trichomonas vaginalis, hypoestrogenism, etc., which need to be analyzed specifically. 1. Mycotic vaginitis: this is caused by fungal infections such as Candida, which is accompanied by itching along with the burning sensation in the vulva. 2. Trichomonas vaginitis: caused by Trichomonas vaginalis infection, which is a kind of parasite, caused by sexual transmission, and will also make the local skin breakthrough, so that there is itching. 3. Estrogen Decline: For menopausal women, estrogen levels are significantly lower, and the vagina loses the nutrition of estrogen locally, which can lead to dryness, atrophy and other conditions, which can also be manifested as itching sensation. Women who have a burning sensation in the vulva and no bacteria are found in the examination, need to go to the hospital in time, with the help of the doctor to clarify the specific cause of the disease, and take standardized measures to alleviate the symptoms of discomfort.