Quick answer
What could vaginal discharge mean?
Vaginal discharge is the fluid produced by glands in the vagina and cervix, and normal discharge is clear or white without a strong odour. A change in colour, smell, itch or volume may indicate thrush, bacterial vaginosis, or an STI. See a GP or sexual health clinic for abnormal discharge, especially with pain, fever, or bleeding after sex.
Vaginal discharge — normal versus abnormal
Vaginal discharge is normal and healthy fluid produced by glands inside the cervix and vagina, and it helps to clean, lubricate, and protect against infection. It naturally changes with the menstrual cycle, hormones, pregnancy, and contraception, so what counts as normal varies between people and across life. Problems tend to arise when its character changes suddenly, whether in colour, smell, or volume, or when it is accompanied by itching, pain, or bleeding.
What normal vaginal discharge looks like
Normal discharge is typically clear, white, or off-white, with a consistency that varies from watery around the middle of the cycle to thicker just before a period. It usually has a mild smell or none at all, and it should not cause itching or burning. It also tends to increase around ovulation and with arousal.
Hormones also influence the pattern: the combined pill often produces lighter discharge, while progesterone-only methods can have a variable effect. Pregnancy increases thin, milky discharge, and at menopause dryness tends to replace discharge as oestrogen levels fall. Knowing what is normal for you makes it much easier to notice a genuine change.
Common causes of abnormal discharge
Thrush, caused by an overgrowth of candida yeast, produces a thick white discharge often described as having a cottage-cheese appearance, along with intense itching, soreness and redness but little or no smell. It is not strictly classed as an STI, and it is usually treated with antifungal pessaries or cream — see our thrush guide for more detail.
Bacterial vaginosis produces a thin, grey-white discharge with a fishy odour that is often worse after sex or a period, along with only minimal itching. It results from an imbalance of the bacteria that normally live in the vagina, and while it is not a classic STI, it is linked to having new partners; it is usually treated with metronidazole gel or tablets from a GP or sexual health clinic.
Trichomoniasis is a sexually transmitted infection that causes a frothy, yellow-green discharge with a strong smell, along with itching and pain when urinating, and it requires both partners to be treated. Chlamydia and gonorrhoea often cause only minimal discharge, which may appear yellow and mucopurulent, along with pelvic pain or bleeding after sex — see our chlamydia guide, and bear in mind that testing is worthwhile even without symptoms. Pelvic inflammatory disease causes discharge alongside lower abdominal pain, fever, and deep pain during sex, and it is treated as an emergency for fertility because delayed treatment can cause lasting damage — see our PID guide for more information.
Other causes of abnormal discharge
A forgotten tampon or other foreign body can cause a sudden, foul-smelling discharge, while dermatitis from a reaction to soaps or other products can also change how discharge looks and feels. Cervical ectropion is a benign change to the cervix that can cause more mucous discharge than usual. Cervical or endometrial cancer can cause blood-stained discharge or postmenopausal bleeding, and this always needs urgent GP assessment.
When to seek help for vaginal discharge
It is worth booking a GP or sexual health clinic appointment if you notice a new colour such as green or yellow, a foul or fishy smell, itching, soreness or pain, bleeding after sex or between periods, pelvic pain or fever, or if a partner has been diagnosed with an STI. Same-day assessment is recommended if you are pregnant and have abnormal discharge or a fever.
What happens at a vaginal discharge appointment
A clinician will usually take a history covering your symptoms, periods, contraception, and sexual partners, followed by an examination that may include a speculum if needed. Swabs are often taken, including a high vaginal swab and an endocervical swab to test for chlamydia and gonorrhoea, and pH testing can help distinguish bacterial vaginosis from thrush, since BV typically raises vaginal pH above 4.5. Some clinics also examine samples under a microscope on the spot. Self-test kits are available for some conditions, but a clinic visit allows the diagnosis to be confirmed and any partners to be treated as well.
Self-care for vaginal discharge — what helps and what harms
Wearing cotton underwear, avoiding perfumed soaps on the vulva, wiping front to back, and using condoms with new partners can all help keep symptoms in check. On the other hand, douching, scented pads or tampons, and unnecessary antibiotics can all disrupt the vagina’s natural balance and make thrush or bacterial vaginosis worse.
Vaginal discharge across life stages
| Stage | Pattern |
|---|---|
| Puberty | Oestrogen levels rise, bringing a new pattern of normal discharge. |
| Reproductive years | Discharge changes cyclically through the menstrual cycle. |
| Pregnancy | Discharge increases, and any abnormal discharge should be reported. |
| Menopause | Dryness becomes common, and local oestrogen can help if it causes symptoms. |
Abnormal discharge is common and usually treatable, but accurate diagnosis matters, because thrush cream will not cure bacterial vaginosis or chlamydia. When in doubt, it is best to get tested rather than guess.
Common questions about vaginal discharge
- What does normal vaginal discharge look like?
- Normal vaginal discharge is clear, white, or off-white, with a consistency that ranges from watery to a thicker white paste across the menstrual cycle, and it tends to increase around ovulation. It should have a mild smell or none at all, and should not cause itching or soreness. The amount varies from person to person, and hormonal contraception and pregnancy can both increase it.
- How do I tell the difference between thrush and bacterial vaginosis?
- Thrush typically causes a thick white discharge with a cottage-cheese appearance, along with intense itching and soreness but no strong fishy smell. Bacterial vaginosis causes a thin grey-white discharge with a fishy smell, especially after sex, and only minimal itching. The two need different treatments, so it is best to have a pharmacist or GP confirm the diagnosis rather than self-diagnosing.
- Can vaginal discharge be a sign of an STI?
- Yes, chlamydia, gonorrhoea, and trichomoniasis can all cause discharge, often yellow or green in colour, along with pain when urinating or pelvic pain. Many STIs cause no symptoms at all, so it is worth testing after unprotected sex regardless. Genital herpes tends to cause ulcers rather than discharge.
- Does vaginal discharge increase in pregnancy?
- Yes, an increase in discharge is a normal physiological change in pregnancy, and it is usually thin, milky, and mild-smelling. Green or yellow discharge, itching, or a foul odour should be reported in pregnancy, as infections need prompt treatment. Thrush is common in pregnancy, so only pregnancy-safe treatments should be used.
- Should I wash inside the vagina to reduce discharge?
- No, douching and harsh soaps disrupt the vagina's healthy bacteria and can worsen bacterial vaginosis and irritation. Only the external vulva should be washed, using water or an unperfumed soap. It also helps to avoid scented products and tight synthetic underwear.