Greenish leucorrhea with a foul odor is mostly caused by inflammation of the vagina, either bacterial vaginitis or trichomoniasis. Lactobacillus peroxide-producing bacteria predominate in the normal vagina. When there is vaginitis, the number of lactobacilli in the vagina decreases and the number of Gatina and its anaerobic bacteria increases, which causes bacterial vaginitis and leads to greenish leukorrhea. After menopause, the ovarian function declines and the level of estrogen decreases, which reduces the local resistance and makes it easy for bacteria to invade and cause vaginitis. Vaginitis is a common disease in women and is related to personal hygiene. In addition to greenish leucorrhea, it can cause congestion and edema of the vaginal mucosa in severe cases, resulting in erosion and ulceration and pain during intercourse, which affects the life of the couple. Having vaginitis can also lead to itching of the vulva, causing the patient to fidget and in severe cases, it can affect study and life. In addition, with trichomonas vaginalis, Trichomonas vaginalis can engulf sperm and affect sperm survival in the vagina, which can affect pregnancy, and the inflammation can also cause premature rupture of the fetal membranes or premature birth if it occurs during pregnancy. Therefore, yellow-green vaginal discharge and abnormal leucorrhea need to be checked by a hospital in time to avoid delaying the condition.