Post-menopausal leucorrhoea should be considered as atrophic vaginitis. Due to the rapid decrease of estrogen level in women’s body after menopause, the vaginal mucosa atrophies. The lactobacillus inside the vagina is no longer the dominant bacterium and other pathogens will overgrow in the vagina and cause inflammation in the vagina, so postmenopausal women will have increased leucorrhea and yellowing, and some will even have vulvar itching. It is best to go to the hospital for a laboratory test of the leucorrhoea, because it is also necessary to look for infections caused by trichomonas, mycobacteria and bacteria. Pay attention to increasing the amount of local estrogen in the process of medication so as to inhibit the growth of bacteria.