Understanding Discharge Colors: A Clinician-Reviewed Guide
Explore our comprehensive clinician-reviewed guide on discharge colors. Learn how white, yellow, green, brown, grey, and pink discharges signal important body health indicators.
AWARENESS
Vaginal discharge is one of your body's most consistent health signals. Its colour, texture, and smell shift throughout your cycle — and learning to read those changes can tell you a lot about what's happening internally.
This guide covers every discharge colour, what it typically means, what makes it normal vs. concerning, and when to seek help.
What makes discharge colour change?
Discharge is produced by glands in the cervix and vaginal walls. Its composition — and therefore its colour — is influenced by:
Oestrogen and progesterone levels, which fluctuate across your cycle
The vaginal microbiome, primarily Lactobacillus bacteria that maintain an acidic pH
Blood from menstruation, ovulation spotting, or irritation
Infection or inflammation, which alters the type and amount of secretions
Medications, particularly antibiotics and hormonal contraceptives
Hydration and diet, which play a minor supporting role
Colour alone doesn't diagnose anything. The same colour can mean different things depending on timing, smell, texture, and other symptoms. Context is everything.
Clear discharge
Clear discharge is the hallmark of a healthy vaginal environment and is normal throughout the cycle.
What it looks like: Transparent, watery, or slightly stretchy — sometimes described as resembling raw egg whites at peak fertility.
When it appears:
Throughout the cycle at low levels
Peaks significantly around ovulation (typically days 12–16 of a 28-day cycle), when oestrogen is highest
Can increase with sexual arousal
What it means: Clear, stretchy discharge around mid-cycle is your body's most reliable ovulation signal. It helps sperm travel through the cervix and is a sign of peak fertility. If you're tracking your cycle or trying to conceive, this is the discharge to watch for.
When to pay attention: Clear discharge that is unusually watery and persistent — without correlation to your cycle phase — can occasionally indicate a yeast infection in its early stages or, rarely, amniotic fluid leakage in pregnancy.
White discharge
White or milky discharge is the most common type and is normal for most of the cycle.
What it looks like: Creamy, milky, or slightly cloudy — ranging from thin to moderately thick.
When it appears:
After ovulation through to just before your period (the luteal phase)
After orgasm
In the days following your period
As a consistent baseline for many women
What it means: White discharge without odour or irritation is healthy. It reflects normal hormonal activity and the cervix maintaining its environment.
When it signals a problem:
Thick, clumpy white discharge that resembles cottage cheese — this is the most recognisable sign of a yeast infection (vaginal candidiasis). It's almost always accompanied by itching, sometimes burning, and occasionally redness or swelling of the vulva. The discharge itself typically has little to no odour, which distinguishes yeast from BV.
Thin white or grey discharge with a fishy smell — this pattern points toward bacterial vaginosis, not a yeast infection. The two are frequently confused because both cause white discharge, but the smell and texture differ significantly.
Yellow discharge
Yellow discharge sits in a grey area — it can be normal or a warning sign depending on shade, smell, and accompanying symptoms.
Pale or light yellow, no odour: This can be normal. Discharge exposed to air oxidises slightly, which can give it a faint yellow tint by the time it reaches your underwear. If there's no smell and no irritation, this is generally not concerning.
Bright or dark yellow, with odour: This is more significant. Possible causes include:
Bacterial vaginosis — though BV discharge is more often grey-white, it can appear yellowish
Trichomoniasis — a sexually transmitted infection caused by a parasite. Trichomoniasis typically produces yellow-green, frothy discharge with a strong smell, and is one of the most common STIs globally
Gonorrhoea or chlamydia — these STIs can cause yellow or cloudy discharge, though many people with chlamydia have no symptoms at all
Cervicitis — inflammation of the cervix, which can be caused by infection or irritation
Rule of thumb: Yellow discharge that smells, is accompanied by itching or burning, or appears alongside pelvic pain should be tested rather than self-treated.
Green discharge
Green discharge is not normal and should always be evaluated.
What it indicates: Green discharge almost always signals infection, most commonly:
Trichomoniasis — the most frequent cause of green discharge. The colour comes from white blood cells responding to the parasitic infection. It's typically frothy, with a strong fishy or musty odour
Gonorrhoea — can produce thick, green or yellow-green discharge, sometimes with pelvic pain or burning during urination
Severe BV — in rare cases, a significant bacterial imbalance can produce greenish discharge
What to do: Don't wait to see if it resolves. Green discharge with odour, especially with any pelvic discomfort, needs a swab test. Both trichomoniasis and gonorrhoea are highly treatable with antibiotics but won't clear without treatment.
Brown discharge
Brown discharge is old blood — red blood that has oxidised as it slowly made its way out of your body, turning brown in the process. In most cases it's harmless.
Normal causes of brown discharge:
End of your period — the last day or two of menstruation often produces brown discharge as the flow slows and blood has more time to oxidise
Beginning of your period — some women see brown spotting in the day or two before their period properly starts
Ovulation spotting — a small number of women experience light brown or pink spotting around ovulation when oestrogen briefly dips
After sex — minor cervical irritation can cause a small amount of spotting that appears brown by the time it exits
On hormonal contraception — breakthrough bleeding on the pill, implant, or hormonal IUD commonly appears as brown spotting, especially in the first few months
When brown discharge needs attention:
Brown discharge that appears regularly between periods with no clear cause
Brown discharge accompanied by a strong or unusual smell — this can indicate infection
Brown discharge during pregnancy (always worth reporting to your midwife or GP, even if ultimately harmless)
Persistent brown discharge after menopause — any post-menopausal bleeding should be investigated promptly
Grey discharge
Grey discharge is uncommon but highly specific — it's closely associated with bacterial vaginosis (BV).
What BV discharge looks like: Thin, watery, grey or grey-white, with a distinctive fishy smell that is often stronger after sex (when the alkaline pH of semen interacts with vaginal bacteria).
About BV: BV is the most common vaginal condition in women aged 15–44. It's not a sexually transmitted infection, but sexual activity can trigger it. It occurs when the balance of vaginal bacteria shifts — Lactobacillus levels drop and other bacteria (particularly Gardnerella vaginalis) overgrow, disrupting pH.
BV does not always cause symptoms. When it does, grey-white discharge with a fishy odour is the most consistent sign. Itching is less common with BV than with a yeast infection — if your main symptom is itch, yeast is more likely.
Treatment: BV requires antibiotic treatment (metronidazole or clindamycin, oral or topical). It has a high recurrence rate — roughly 50% of women who treat BV experience it again within a year. Avoiding douching and using condoms consistently can reduce recurrence risk.
Pink discharge
Pink discharge indicates a small amount of fresh blood mixing with normal discharge.
Normal causes:
Ovulation spotting — brief pink or light brown discharge mid-cycle affects around 5% of women and is harmless
Implantation bleeding — light pink spotting around 6–12 days after ovulation can indicate early pregnancy. It's typically much lighter than a period and lasts only 1–2 days
End or beginning of period — as with brown discharge, the lightest days of your period can produce pink rather than red blood
After a cervical exam or smear test — the cervix is sensitive and may bleed slightly after being touched
When pink discharge warrants attention:
Pink discharge after sex that happens repeatedly (possible cervical ectropion, polyp, or in rare cases, cervical cancer — all of which are diagnosable)
Pink discharge during pregnancy beyond very light spotting
Pink discharge accompanied by cramping outside your normal period
Red discharge
Red discharge is typically period blood — but not always.
Normal: Period blood ranges from bright red at peak flow to darker red or brown at the lighter stages. This is entirely normal variation.
Worth checking:
Bright red bleeding between periods (intermenstrual bleeding) — causes include hormonal imbalance, cervical polyps, fibroids, or in rare cases cervical changes that need investigating
Heavy red bleeding with large clots — if you're soaking more than one pad per hour for several hours, this is considered heavy menstrual bleeding and should be evaluated
Red bleeding after menopause — always investigate
Discharge colour quick reference
When to act regardless of colour
Colour is one signal, not a complete picture. See a healthcare professional if your discharge — in any colour — is accompanied by:
A strong, persistent, or fishy odour
Itching, burning, or soreness
Pain in the lower abdomen or pelvis
Pain during sex or urination
Sudden change from your normal pattern that doesn't resolve within a cycle
Any symptoms during pregnancy
Why self-diagnosis is unreliable
The most important takeaway from this guide is that discharge colours overlap significantly between conditions. Grey-white discharge could be BV or a normal luteal-phase discharge. Yellow discharge could be normal oxidation or trichomoniasis. White clumpy discharge is strongly associated with yeast infections — but not exclusively.
This is why symptom context matters more than colour alone. Timing in your cycle, smell, texture, associated symptoms, and your individual baseline all contribute to an accurate interpretation. Muuza is built around exactly this principle — analysing multiple signals together rather than a single characteristic in isolation, to give you a clearer and more reliable picture of what's happening.
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Not sure what your discharge is telling you?
Colour is just one signal. Muuza analyses discharge patterns alongside your symptoms and cycle timing to give you a clearer, clinician-backed answer — in minutes, not days.