New Health Experts Q&A Women’s Health

What causes the fishy smell of leucorrhea

Asked by:Vili

Asked on:Apr 10, 2026 11:16 AM

Answers:1 Views:363
  • Amanda Amanda

    Apr 10, 2026

    The fishy odor of leucorrhea may be related to bacterial vaginosis, trichomonal vaginitis, cervicitis, endometrial infection, vaginal foreign bodies and other causes. Abnormal leucorrhea usually manifests as color changes, texture changes, abnormal odor and other symptoms, which require targeted treatment based on the specific cause.

    1. Bacterial vaginosis

    Bacterial vaginosis is an infection caused by an imbalance of normal flora in the vagina, which may be related to factors such as frequent vaginal douching and active sexual life. The patient's leucorrhea is often gray-white in color, accompanied by a fishy odor, and the vulva may be slightly itchy. For treatment, you can use metronidazole vaginal effervescent tablets, clindamycin phosphate vaginal cream, tinidazole suppositories and other drugs as directed by your doctor. At the same time, avoid excessive cleaning of the vagina.

    2. Trichomonal vaginitis

    Trichomonas vaginitis is caused by Trichomonas vaginalis infection and is mainly spread through sexual contact. The typical manifestation is yellow-green foamy leucorrhea with a distinct fishy odor, which may be accompanied by a burning sensation in the vulva or painful urination. Treatment requires the use of metronidazole tablets, tinidazole tablets, ornidazole capsules and other drugs as directed by the doctor, and sexual partners need to be treated simultaneously to prevent cross-infection.

    3. Cervicitis

    Cervicitis is mostly caused by gonorrhea, chlamydia and other pathogenic infections, and may be related to factors such as unclean sex and multiple artificial abortions. The patient's leucorrhea is purulent or mucus-like, has a fishy smell, and may be accompanied by bleeding after sexual intercourse. Drugs such as azithromycin dispersible tablets, doxycycline tablets, and Baofukang suppositories can be used for treatment. In severe cases, physical therapy is required.

    4. Endometrial infection

    Endometrial infection is often secondary to uterine cavity operations or postpartum, and is related to ascending bacterial infection. Leucorrhea is purulent and has a foul odor, and may be accompanied by lower abdominal pain and fever. Treatment requires the use of cefixime capsules, levofloxacin tablets, Fuke Qianjin capsules and other drugs as directed by the doctor. If necessary, hospitalization is required for anti-infective treatment.

    5. Vaginal foreign body

    Foreign objects such as tampons and condoms left in the vagina may cause putrid leucorrhea, accompanied by a strong fishy smell, which is common in children or postmenopausal women. It is necessary to seek medical treatment promptly to remove the foreign body, and use metronidazole sodium chloride injection, povidone-iodine solution, etc. to prevent infection, and at the same time check whether there are other injuries.

    Pay attention to perineal cleansing on a daily basis, choose cotton breathable underwear and change it daily, and avoid using irritating vaginal washes. Pay attention to hygiene before and after sex. If abnormal leucorrhea lasts for more than 3 days or is accompanied by abdominal pain, fever and other symptoms, you should seek medical treatment in time. Eating a light diet and supplementing an appropriate amount of yogurt containing lactic acid bacteria can help maintain the balance of vaginal microecology, but it cannot replace drug treatment.

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