Postpartum leucorrhoea is generally considered to be due to various gynecological inflammatory diseases causing abnormal secretions, as follows: 1. Trichomonas vaginalis, is one of the most common causes of postpartum leucorrhoea. In addition to the yellowing of the leucorrhea, the patient will also have symptoms of itching in the vulva and vaginal area and a distinct local odor. The patient will need to do routine laboratory tests of the leucorrhoea and use nitroimidazole antibacterial drugs for treatment after a clear diagnosis. 2, endometritis, the maternal cervical opening after childbirth is not completely closed, the endometrium has trauma formation, easy to infect various pathogenic microbes and inflammation. If the postpartum personal hygiene habits are poor or premature sex, it may cause endometritis and yellowing of the leucorrhea. The woman may have obvious pain and discomfort in the lower abdomen and lumbosacral area, and may also have fever.