You notice your discharge looks different from what you are used to: another colour, a strange smell, or simply more than normal. The question comes at once: is this harmless, or is an STI behind it? The honest answer is that discharge is completely normal in most cases. It only becomes a signal when the colour, smell or feel clearly changes, and that change is exactly what you can learn to read.
Our position: the discharge itself is not the alarm, the combination of changes around it is. A single deviation says little. A pattern says a lot.
Reading discharge: colour, smell and feel
Use the table below to see what a changing pattern likely means. It is a decision aid, not a diagnosis. When in doubt, a targeted check gives clarity.
| What you notice | Likely cause | STI or not | What to do |
|---|---|---|---|
| Clear or milky white, odourless, varies with your cycle | Normal discharge | Not an STI | No action needed |
| White and lumpy (curd-like), itching, no foul smell | Yeast infection (candida) | Not an STI | Pharmacy or GP |
| Greyish white, thin film, fishy smell | Bacterial vaginosis | Not an STI | GP for the right treatment |
| Yellow-green, cloudy, more than usual, sometimes burning urination | Chlamydia or gonorrhoea | STI | Combined check |
| Frothy, yellow-green, strong smell, itching | Trichomonas | STI | PCR check for trichomonas |
| Clear or whitish discharge from the penis, burning urination | Chlamydia or gonorrhoea | STI | Gonorrhoea check or combined check |
What is normal discharge anyway?
Vaginal discharge has a function: it keeps the lining moist and clean. The amount and texture vary with your cycle, often more and stretchier around ovulation. In men some clear discharge during arousal is normal. According to Thuisarts.nl, changing discharge does not always need investigation, and it is mainly the combination with itching, smell or burning that points to something needing attention.
When does it point to an STI?
It becomes suspicious when several things change at once, for example a different colour plus burning urination, or a strong smell plus itching, especially after recent unprotected contact. Chlamydia and gonorrhoea often cause yellow-green or cloudy discharge, trichomonas often frothy discharge with a pronounced smell. At the same time an important nuance applies: the RIVM describes in its annual STI figures that many STIs run without clear discharge. No discharge therefore does not rule out an STI.
Which check fits, and when?
For discharge with an STI background a PCR check is the right route. Chlamydia and gonorrhoea can be checked reliably from about 2 weeks after contact, trichomonas from 1 to 2 weeks. If you want to rule out the most common causes at once, the combined check for chlamydia, gonorrhoea and trichomonas covers that broadly. If you mainly suspect chlamydia, a targeted chlamydia check is enough. The exact test moments are in how long after sex you can test.
When to see your GP?
A yeast infection or bacterial vaginosis is not an STI, but sometimes does need treatment. See your GP for:
- Discharge with fever or lower abdominal pain
- Bloody discharge outside your period
- Complaints during pregnancy
- Discharge that persists after a negative STI check
- Recurring yeast or vaginosis complaints
Discharge in men: a different story
In men there is normally little to no discharge outside arousal. That is exactly why discharge from the penis is a clearer signal than in women. Clear or whitish discharge, especially combined with burning urination, often fits chlamydia or gonorrhoea. Gonorrhoea classically causes a thicker, yellow-green discharge, while chlamydia is often more subtle and easily overlooked. Because complaints in men stand out sooner, the step to a check is often smaller, but here too the absence of discharge does not rule out an STI.
Home test, GGD or GP: where do you get checked?
If you suspect a yeast infection or bacterial vaginosis, the GP or pharmacy is the logical step, because those are not STIs. If the pattern points towards an STI, an anonymous home test is a low-threshold route: you collect your material at home and get your results online, without it going into your GP file. The GGD sometimes tests for free, but applies conditions around age and risk group, so not everyone qualifies. More on this is in GGD test refused. Choose the route that fits your complaints and your need for privacy.
If you are torn between different causes of complaints down there, also read genital itching and irritation. For the full testing overview, which STI test you need when is your starting point. Changing discharge is usually nothing serious, but if you want to be sure, a targeted check gives you calm and quick clarity.
Also read the overview STI symptoms in men and women, and compare with STI symptoms in women and STI without symptoms.
Author
Discreettest
Dr. Naimi, BIG-registered physician, oversees the medical standards behind our content and assessments. Read our medical policy
