Cyanotic leucorrhea with vulvar itching is usually abnormal and is mainly considered to be caused by trichomonas vaginalis and cervicitis. In this case, you should go to the hospital for gynecological examination and routine leucorrhoea examination to clarify the pathogens and carry out targeted treatment. The main causes and treatments are 1. Trichomonas vaginalis: caused by Trichomonas vaginalis, it can lead to yellowish-green, thin and foamy leucorrhea, often accompanied by vulvar itching, burning sensation, pain, and foul-smelling leucorrhea. The disease is commonly treated with antibacterial drugs, such as metronidazole and tinidazole. 2. Cervicitis: due to infection by pathogens such as Neisseria gonorrhoeae, Chlamydia and Mycoplasma, the discharge increases and changes in character, and may be yellowish-green in color. As the vulvar skin is more delicate, it is easily stimulated by the discharge, which in turn causes itching and discomfort. The disease can be treated with oral medications such as azithromycin or doxycycline under the guidance of a medical professional. During the treatment period, patients should avoid intercourse and bathing to avoid cross-infection. It is recommended to choose loose and breathable cotton underwear, pay attention to maintain private hygiene, can be morning and evening with warm water scrubbing vulva, diligent change of underwear. In addition, emotions can also affect the recovery of the disease, pay attention to maintain an optimistic state of mind, avoid sadness, anxiety and other bad emotions.