Genital discharge: When is it normal and when should you get checked?

By Dr Tariq Jagnarine

Fam Med

Genital discharge is a topic many people hesitate to discuss. Some feel embarrassed, others assume it always means a sexually transmitted infection, and some simply wait for it to disappear.
The truth is more balanced.
Some genital discharge is completely normal. Other discharge can be a sign of infection or another medical problem.
What matters is recognising the difference and seeking care when something has changed.

Vaginal discharge can be normal
The vagina naturally produces fluid that helps keep it healthy.
Normal vaginal discharge may be:
• Clear or white
• Mild smelling or without a strong odour
• Thicker or thinner at different times of the menstrual cycle
• Increased around ovulation, pregnancy, or sexual arousal
Normal discharge usually does not cause significant itching, burning, pelvic pain, or sores.
So having discharge does not automatically mean that something is wrong.

When vaginal discharge changes
A change in colour, smell, amount, or consistency can sometimes indicate infection.
Thick, white discharge with itching
This may occur with vaginal candidiasis or “yeast infection”.
There may also be:
• Significant itching
• Redness
• Burning
• Discomfort during sex or urination
Candidiasis is not usually classified as a sexually transmitted infection, although sexual activity and other factors may influence symptoms.

Thin discharge with a strong or “fishy” smell
This may occur with bacterial vaginosis (BV).
BV develops when the normal balance of bacteria in the vagina changes. It is not simply caused by “poor hygiene,” and excessive washing or vaginal douching can actually disturb the normal vaginal environment.

Yellow, green or unusual discharge
This can occur with infections such as trichomoniasis, gonorrhoea or other sexually transmitted infections.
Symptoms may include:
• Burning when passing urine
• Itching
• Pain during sex
• Lower abdominal or pelvic pain
• Bleeding after sex or between periods
However, some sexually transmitted infections cause very few symptoms or no symptoms at all.

What about discharge from the penis?
Discharge from the penis, particularly when it is new, is generally not considered normal and should be evaluated.
It may appear:
• White
• Cloudy
• Yellow
• Green
• Thick or watery
Common causes include infections such as:
• Gonorrhoea
• Chlamydia
• Other causes of urethritis
There may also be:
• Burning or pain during urination
• Itching or irritation inside the penis
• Testicular discomfort
• Pain during sex
But again, symptoms do not always tell us exactly which infection is present.

Don’t diagnose yourself by colour alone
One of the most important messages for patients is this:
You cannot reliably diagnose a genital infection simply by looking at the colour of the discharge.
Several conditions can look similar.
For example, vaginal discharge could result from bacterial vaginosis, candidiasis, trichomoniasis, gonorrhoea, chlamydia or inflammation of the cervix.
That is why proper assessment – and testing where available –is important.

Could it be an STI?
Yes, sometimes.
Sexually transmitted infections such as gonorrhoea, chlamydia and trichomoniasis can cause genital discharge.
But discharge does not automatically mean an STI, and many STIs do not cause discharge at all.
This is why STI testing is particularly important if you:
• Have had sex without a condom
• Have a new sexual partner
• Have multiple partners
• Have a partner diagnosed with an STI
• Have genital sores or ulcers
• Have burning during urination
• Develop unexplained pelvic or testicular pain
Testing allows treatment to be targeted appropriately and helps prevent transmission to others.
Why early treatment matters
Untreated genital infections can sometimes lead to complications.
In women, untreated gonorrhoea or chlamydia may spread into the reproductive tract and cause pelvic inflammatory disease (PID).
PID can increase the risk of:
• Chronic pelvic pain
• Infertility
• Ectopic pregnancy
In men, some infections may cause inflammation around the testicle and reproductive structures.
During pregnancy, certain genital infections can also affect both the pregnant person and the baby.
Early diagnosis matters.

Warning signs that need medical attention
Seek care promptly if genital discharge occurs with:
• Severe lower abdominal or pelvic pain
• Fever
• Testicular pain or swelling
• Genital ulcers, sores or blisters
• Bleeding after sex
• Bleeding between periods
• Pregnancy with pain, bleeding or unusual discharge
• Severe pain during urination
• Persistent or worsening symptoms
A very unwell person with pelvic pain and fever should not simply treat the discharge at home.

Avoid the “quick fix”
Many people respond to genital discharge by buying antibiotics, antifungal tablets or vaginal preparations without being assessed.
This can create several problems.
The wrong medication may:
• Fail to treat the actual infection
• Temporarily hide symptoms
• Cause side effects
• Disturb normal vaginal bacteria
• Contribute to antimicrobial resistance
Repeatedly using antibiotics whenever discharge occurs is particularly concerning.
Not every discharge needs antibiotics.

What about your sexual partner?
If an STI is diagnosed, sexual partners may also require evaluation and treatment.
Treating one person while an infected partner remains untreated can lead to reinfection.
Depending on the infection, you may also be advised to avoid sexual activity until treatment has been completed and it is safe to resume.
Condoms remain one of the most effective ways of reducing transmission of many sexually transmitted infections.

Please don’t douche
Some people wash inside the vagina or use perfumed products because they believe this prevents infection or removes discharge.
The vagina is naturally self-cleaning.
Douching and strong scented products may alter the normal vaginal environment and can contribute to irritation and bacterial imbalance.
Routine hygiene should focus on gently washing the external genital area.

My reflection as a family physician
Genital discharge is one of those symptoms that patients often delay discussing because they fear judgement.
Health care should never make someone feel ashamed for seeking help with a sexual or reproductive health concern.
The consultation should instead answer a few important questions:
Is this discharge normal?
Could there be an infection?
Is STI testing needed?
Is there a complication developing?
Does a partner also need treatment?
The earlier those questions are answered, the easier many of these conditions are to manage.
Genital discharge is not always an infection, and an infection is not always an STI.
But if the discharge is new, unusual, foul smelling, associated with pain, itching, burning, sores or bleeding, or if you have recently had unprotected sex, get assessed.
Don’t guess. Don’t self-medicate repeatedly. Get tested when appropriate and get the right treatment.
And remember: No shame. No judgement. Just health care.