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Some vaginal discharge is entirely normal and healthy. It is the vagina’s self-cleaning mechanism, and its amount and consistency change naturally through the menstrual cycle, during pregnancy and with arousal. What needs attention is a change in colour, smell, quantity or consistency, or discharge accompanied by itching, burning, pain or bleeding.
Normal discharge is clear to milky white, has no strong odour, and does not cause itching or burning. It is thin and stretchy around ovulation, thicker and creamier in the second half of the cycle, and increases in pregnancy and with hormonal contraceptives. Attempting to eliminate it through douching or intimate washes is counterproductive, as it destroys the protective lactobacilli and causes the very infections women are trying to prevent.
1. Thick, white, curd-like with intense itching: Vaginal candidiasis (fungal infection), usually without odour.
2. Thin, greyish-white with a fishy smell, worse after intercourse: Bacterial vaginosis.
3. Frothy, yellow-green with itching and soreness: Trichomoniasis, a sexually transmitted infection.
4. Yellow or purulent with pelvic pain and fever: Cervicitis or pelvic inflammatory disease, often from chlamydia or gonorrhoea.
5. Watery, blood-stained or foul-smelling, particularly after menopause: Needs prompt evaluation to exclude cervical or endometrial pathology.
6. Persistent discharge with a retained object: A forgotten tampon or pessary produces a characteristically offensive discharge.
1. Fungal, bacterial and trichomonal infections
2. Sexually transmitted infections including chlamydia and gonorrhoea
3. Cervical ectopy, polyps and chronic cervicitis
4. Uncontrolled diabetes, which strongly predisposes to recurrent candidiasis
5. Recent antibiotic use, disturbing the normal vaginal flora
6. Douching, scented washes, wipes and irritant contact reactions
7. Retained foreign body, and rarely cervical or endometrial malignancy
Consult a gynaecologist if discharge changes in colour or smell, is accompanied by itching, burning, pelvic pain, fever or bleeding, occurs after intercourse or after menopause, or keeps recurring despite treatment. Self-medicating with repeated over-the-counter antifungals is one of the commonest reasons bacterial vaginosis and trichomoniasis go untreated for months, since neither responds to antifungal treatment.
1. Identify the organism: Examination, vaginal pH testing, wet mount microscopy and culture where indicated. Treating blindly is what causes recurrence.
2. Antifungal therapy: Topical or oral, for confirmed candidiasis, with a longer maintenance course in recurrent cases.
3. Antibiotic therapy: Metronidazole for bacterial vaginosis and trichomoniasis, with partner treatment for the latter.
4. Treat sexually transmitted infections properly: Both partners, complete course, with a test of cure. See our female STD treatment page.
5. Restore the vaginal flora: Probiotics and stopping douching and scented products.
6. Control blood sugar: Essential in recurrent candidiasis, which is often the presenting sign of undiagnosed diabetes.
7. Investigate persistent cases: Pap smear, colposcopy or ultrasound where discharge is blood-stained or does not settle with treatment. See also recurrent vaginal infections.
Untreated chlamydia and gonorrhoea are the classic example of why this matters. Both frequently cause minimal symptoms yet ascend to the tubes, causing pelvic inflammatory disease, scarring and tubal infertility that no later antibiotic can reverse. Untreated bacterial vaginosis increases the risk of preterm labour in pregnancy and of acquiring other infections. And in post-menopausal women, persistent discharge dismissed as infection can be the first sign of a cervical or endometrial malignancy. A single swab and examination resolves the question.

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