Leukorrhea is mainly a clinical condition in which the secretion of the local mucous membrane of the cervix increases under the effect of estrogen and progesterone, and the secretion of the vaginal mucous membrane increases. Normal leukorrhea is milky white with no odor or only a faint fishy odor, which is normal. If the leucorrhea is yellow and relatively odorous, and if it is accompanied by vulvar itching or bloody leucorrhea, it is abnormal. It is often due to local inflammation of the cervix, resulting in an increase in secretion from the glandular ducts. In addition, it may also be clinically due to local inflammation of the vagina, resulting in increased secretion. Therefore, it is recommended to go to the hospital for examination and treatment when abnormalities are detected.