Vulvar itching and yellowish leucorrhea are mostly caused by gynecological inflammation. Patients are advised to go to the hospital for timely examination to clarify the pathogens of infection. If the leucorrhea is yellow, most of them are inflammatory manifestations and belong to pathology, mainly seen in mycosis vaginalis, where the leucorrhea is yellow or white, with typical tofu slag-like or milky clot, the patient also has vulvar itching, and it is very serious, the leucorrhea has a little odor. Trichomoniasis also has yellowish or yellow-green pus-like or foamy leucorrhea, also accompanied by vulvar itching, but with a more pronounced odor. Normal leucorrhea is milky white or colorless, slightly fishy or no smell; the quality of the secretion is affected by the level of estrogen and progesterone in the body, and will change with the menstrual cycle in terms of quantity. If you find yellowing of the leucorrhea, it is best to go to the hospital for a laboratory test and give different treatments according to different conditions.