Normal female leucorrhea is clear or milky white with no odor. If the leucorrhea is yellow, it is usually caused by vaginitis, most commonly bacterial vaginitis, which is yellow and watery, sometimes accompanied by odor. Treatment can be metronidazole or clindamycin, and topical medication can be bifontaine suppositories. Trichomoniasis can also be characterized by yellowish, frothy leucorrhea, vulvovaginal congestion, and trichomonas can be seen on a white blood smear. Trichomoniasis is mainly treated with metronidazole. During treatment, couples need to be treated together, pay attention to hygiene, pay attention to gynecological hygiene, wash the vulva with water and disinfect underwear.