Vaginal discharge is a normal part of how the female reproductive system keeps itself clean and healthy. Most women have some discharge every day; the amount, colour, and consistency change throughout the menstrual cycle, and this variation is normal. The problem ariusual ses when discharge changes in a way that signals something is wrong - a different colour, an unusual smell, an increase in volume, or a change in texture that does not follow the cycle pattern.
Abnormal vaginal discharge is one of the most common reasons Indian women visit a gynaecologist, yet it is also one of the most commonly ignored; often because of embarrassment or the mistaken belief that all discharge is normal. Knowing the difference between normal and abnormal, and recognising what different types of discharge might indicate, helps women seek the right care at the right time.
Normal vaginal discharge is produced by the glands in the vagina and cervix. It is a way to discard any dead cells or bacteria. It is a natural way of cleaning the vaginal area and protecting against any infections. A normal discharge is clear or white in colour, is mostly thin and stretchy, odourless, and changes in quantity based on the menstrual cycle.
What becomes worth investigating is discharge that is outside this pattern, especially if it is associated with itching, burning, an unusual smell, or a change in colour.
Vaginal Discharge Causes: When It Becomes Abnormal
BV is a common cause of abnormal vaginal discharge. It occurs when there is a change in the bacterial balance. In most cases, the good bacteria are reduced, and other harmful bacteria increase. The discharge can be thin, watery, greyish, or have a foul smell. It can develop due to new sexual activity, douching, scented soaps, or hormonal changes.
Vaginal thrush, caused by the fungus Candida albicans, is the second most common cause of abnormal discharge. Most women will have at least one episode in their lifetime, and recurrent thrush (four or more episodes a year) is a recognised and frustrating problem.
Discharge from a yeast infection is:
Thick, white, and lumpy - often described as resembling cottage cheese or curd
Odourless or very mildly yeasty
Associated with significant itching, soreness, and redness around the vulva and vaginal opening
Candida is not a sexually transmitted infection (STI). It is an overgrowth of a fungus that is normally present in small amounts in the vagina. Triggers can be antibiotic use (which reduces protective bacteria), high blood sugar (which is why diabetic women get more yeast infections), pregnancy, and immune suppression.
Trichomoniasis is an STI caused by a parasite. It is less commonly discussed but not uncommon in India.
The discharge is:
Yellow-green in colour
Frothy or bubbly in texture
Foul-smelling
Often accompanied by itching, burning, and redness
Importantly, trichomoniasis in men rarely causes symptoms, meaning a male partner can be infected and transmit without knowing. Both partners need treatment simultaneously for the infection to be cleared.
These STIs can cause abnormal discharge but are frequently asymptomatic - especially in the early stages.
When discharge is present:
Chlamydia may cause a slight increase in clear or white discharge, sometimes with a mild odour
Gonorrhoea more typically causes a yellow or green, thicker discharge
The bigger concern with both is the risk of ascending infection; if untreated, either can travel into the uterus and fallopian tubes, causing pelvic inflammatory disease (PID) and potentially permanent damage to the tubes.
A cervical polyp is a small, benign growth on the cervix. A cervical ectropion is when the inner lining of the cervix extends to the outer surface. Both can cause increased vaginal discharge and spotting, especially after sex.
Neither is dangerous in most cases, but both need to be confirmed by a gynaecologist, as other causes of post-coital bleeding must be excluded.
After menopause, falling oestrogen levels cause the vaginal lining to thin and become dry. This can cause increased discharge that is watery or slightly bloody, alongside vaginal dryness, itching, and discomfort during sex. This is called atrophic vaginitis and responds well to local oestrogen treatment.
Unusual vaginal discharge that warrants a gynaecologist visit includes:
Discharge that is yellow, green, or grey
Discharge with a strong or foul smell - especially a fishy odour
Discharge that is thick and lumpy with itching
Discharge that is frothy or bubbly
Blood-tinged discharge outside of periods, especially after sex
Any discharge accompanied by pelvic pain, fever, or burning during urination
Discharge that is new, changed, or persisting despite home remedies
The combination of symptoms gives important clues: discharge with itching suggests yeast, discharge with a fishy smell suggests BV, and discharge with pelvic pain suggests possible PID.
A gynaecologist will take a history and examine the discharge - its colour, smell, and consistency. Investigations typically include:
High vaginal swab to identify bacteria or yeast under the microscope and on culture
Endocervical swab specifically for chlamydia and gonorrhoea testing
pH testing - vaginal pH above 4.5 suggests BV or trichomoniasis; a lower pH suggests yeast
Wet mount microscopy - immediate microscopic examination of the discharge, which can identify clue cells (BV), yeast hyphae (candida), or the trichomonas parasite
Vaginal discharge treatment is entirely dependent on the cause, which is why self-treating with an antifungal cream every time there is unusual discharge is not a good strategy.
BV: Treated with metronidazole, either as a tablet course for 7 days or as a vaginal gel. Both partners do not need treatment unless the woman has recurrent BV related to sexual activity. Avoiding douching and scented products reduces recurrence.
Candida: Treated with antifungal medication prescribed by a doctor. For recurrent infection, a longer suppressive course may be recommended.
Trichomoniasis: Treated with metronidazole, and both partners must be treated simultaneously.
Chlamydia: Treated with azithromycin or doxycycline. The partner needs to be notified and treated.
Gonorrhoea: Treated with ceftriaxone injection. The partner also needs to be treated.
Atrophic vaginitis: Treated with local vaginal oestrogen cream or pessaries, which restore the vaginal lining and resolve discharge and dryness without significantly affecting systemic oestrogen levels.
Vaginal discharge is not always a cause for concern, but changes in colour, smell, texture, or the presence of itching or pain are worth taking seriously. Most causes of abnormal vaginal discharge are easily treatable, but they need the right diagnosis first. Do not self-treat repeatedly without being assessed. A swab test and a gynaecologist visit are all it takes to get the right answer and the right treatment.
Vaginal discharge causes include bacterial vaginosis, yeast infections, STIs like chlamydia, gonorrhoea, and trichomoniasis, cervical polyps, and atrophic vaginitis after menopause. Each cause has a different discharge pattern - colour, smell, and texture provide important clues. A high vaginal swab confirms the specific cause and guides the correct treatment.
Normal discharge is clear to white, odourless, and varies with the menstrual cycle. Abnormal types include thin, greyish-white, fishy-smelling discharge, thick white lumpy discharge with itching, frothy yellow-green discharge with a foul smell, and yellow or green discharge from STIs like chlamydia or gonorrhoea. Watery or blood-tinged discharge after menopause suggests atrophic vaginitis. Each type points to a different underlying cause.
Abnormal vaginal discharge differs from normal discharge in colour, smell, texture, or amount. It is also abnormal when accompanied by itching, burning, pain during sex, pelvic pain, or bleeding outside of periods. A single unusual episode may resolve on its own, but discharge that persists, worsens, or is associated with other symptoms should always be assessed by a gynaecologist with a swab test.
Yes, virtually all common vaginal infections cause unusual vaginal discharge as their primary symptom. Bacterial vaginosis causes thin, fishy-smelling grey discharge. Yeast infections cause thick, lumpy white discharge with itching. Trichomoniasis causes frothy, foul-smelling yellow-green discharge. Chlamydia and gonorrhoea may cause increased or coloured discharge, or none at all.
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