An STI test without symptoms is often worthwhile precisely because of that. With many STIs, up to 70% of women and 50% of men have no symptoms at all. You can carry an infection, pass it on unnoticed, and only develop complications years later. No symptoms doesn't mean no risk. Whether testing is wise depends on what happened, not on what you feel.
That may sound unsettling, but it's mainly a reason not to be reassured by the absence of symptoms. Testing is the only way to know for sure.
Can you have an STI without symptoms?
Yes, and it's more the rule than the exception. In about 80% of all STI infections the infection runs without clear symptoms. You notice nothing, while the infection is present and stays transmissible. That's exactly why STIs spread so easily.
The Dutch National Institute for Public Health (RIVM) notes in its annual figures that many infections are found in people without symptoms (RIVM). The absence of symptoms says little about your actual status.
Which STIs often have no symptoms?
Some STIs are known for running silently. Chlamydia is the best-known example, but it applies to others too. Below you see how often an infection runs without symptoms.
- Chlamydia - up to 70% of women and 50% of men have no symptoms
- Gonorrhoea - often symptom-free, especially in women and in throat infections
- Trichomonas - usually without symptoms in men
- HIV - after an initial flu-like phase it can be present for years without symptoms
- Syphilis - the first sore is painless and heals on its own while the infection continues
Soa Aids Nederland explains that with none of these infections can you rely on symptoms to reassure yourself (soaaids.nl). A test gives certainty, your gut feeling doesn't.
When is testing without symptoms worthwhile?
Testing without symptoms is mainly worthwhile after a situation with risk, not as a fixed routine without reason. The question isn't whether you feel something, but whether there was a moment when infection was possible. In that case a test is the only way to get certainty.
The following situations are a good reason to get tested, even without symptoms.
- After unprotected sexual contact with someone whose status you don't know
- At the start of a new relationship, before you drop condoms
- If a (former) partner has tested positive
- With changing contacts, usually at least once a year
After a risk contact, do wait until the window period has passed. For chlamydia and gonorrhoea that's 2 weeks, for HIV and syphilis 4 weeks. Test earlier and an infection may still be missed.
What changed at the GGD in 2025?
Since 2025 the Dutch sexual-health clinic (GGD) no longer routinely tests chlamydia in people without symptoms. The background: in people without symptoms and without raised risk, routine chlamydia testing doesn't always lead to health benefit. The GGD therefore focuses its capacity more on higher-risk groups.
For you this means the free GGD route isn't always open if you have no symptoms. A home test or a test at the GP then stays available if you still want certainty. Read more about what an STI test costs per route.
Which test do you pick without symptoms?
Without symptoms and without a clear pointer to which STI it might be, a broad screen gives the most to go on. A full panel covers the most common STIs in one go, so you don't have to guess.
If you're fairly sure where the risk was, for example after contact with a partner who tested positive for a specific STI, a targeted test makes more sense. In all other cases a full STD screen is the safest choice.
No symptoms, test anyway? How to decide
No symptoms is reassuring, but it's not proof. With most STIs you feel nothing at first, while the infection continues. If there was a risk moment, testing after the window period is the only way to know for sure. Unsure whether you should test more often, read why regular STI screening brings peace of mind. If you do have mild urinary symptoms, see the difference between an STD and a UTI.
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