For women of normal reproductive age, the absence of leukorrhea is not good. Leukorrhea is a mixture of vaginal mucous membrane exudate, cervical canal and endometrial gland secretion, and its formation is related to the effect of estrogen. If a woman of childbearing age has no leukorrhea, it means that her estrogen level is low. For low estrogen level in reproductive age, it is necessary to further check what causes the low estrogen level, and then decide the next step of treatment according to the situation, which is commonly ovarian hypogonadism. Normal leukorrhea is white, pasty or egg-white, sticky, low in volume and without a fishy odor, and is called physiologic leukorrhea. Inflammatory diseases of the reproductive tract, such as vaginitis and cervicitis, or when cancer occurs, the amount of leukorrhea increases significantly, and there is also a change in the nature of the leukorrhea, which is called pathological leukorrhea.