Itching of the vulva and yellowing of the leucorrhoea are typical symptoms of vaginitis. Leucorrhoea is a vaginal discharge in women, which in the absence of inflammatory stimuli is small, transparent, odorless and itchy. When the leukorrhea changes in nature, a vaginal discharge examination should be performed. If there is an obvious bacterial infection that can give direct indication, common Gardnerella, Trichomonas vaginalis, and Candida can cause abnormal vaginal discharge. Trichomonas infection is most likely to present with a yellow discharge with significant itching and pain. In the case of specific types of inflammation of the genital tract, such as tuberculosis, mycoplasma or chlamydia infections, the discharge may be yellowish-purulent and the itching may be less pronounced. With sexually transmitted diseases such as syphilis and condyloma acuminatum, itching and yellow leucorrhea may easily occur as a complication of various bacterial infections due to the low immunity of the vagina after the disease.