If the patient’s vulvar itching, yellowish leukorrhea, but leukorrhea without odor, may be caused by the following reasons: First, trichomonas vaginitis, can lead to more serious vulvar itching, not only leukorrhea yellowish, but also will be manifested as leukorrhea like foam, often accompanied by bloody leukorrhea, through the laboratory can be a clear diagnosis, the use of metronidazole or tinidazole to give treatment, the clinical symptoms will be relieved very soon. Second, may be mycoplasma or chlamydia infection caused by the inflammatory response, in the clinic will also be manifested in this symptom, and there may be urinary symptoms, such as urinary frequency, urinary urgency, urinary pain, through the high magnification of the leukorrhea routine laboratory tests can learn whether there is mycoplasma, chlamydia infection, preferred azithromycin treatment.