As the formation of leucorrhoea is closely related to estrogen and progesterone in the body. The absence of leucorrhoea in women can be a normal physiological phenomenon or may be caused by disease, which needs to be judged according to the situation: 1. Normal physiological situation: Before puberty, there is no leucorrhoea because female sexual development is not yet mature and there is no sufficient amount of sex hormone secretion. Similarly, after menopause, the estrogen in women’s bodies will decline rapidly and menstruation will stop, while leucorrhea will also gradually disappear, which is a normal physiological process; 2, abnormal pathological conditions: commonly caused by ovarian damage, more miscarriages, prolonged breastfeeding, long-term trauma and various chronic diseases, resulting in ovarian dysfunction or decompensation, low levels of female sex hormones, local muscle fibers and mucous membrane cells of the vagina atrophy, on There is a decrease in vaginal discharge and symptoms such as no leukorrhea and vaginal dryness. At this time, a leucorrhoea examination should be performed, and if there is a problem, medication is usually required, especially if there is no leucorrhoea after abortion, further examination for inflammatory infection is usually required.