An STI without symptoms is more the rule than the exception. With chlamydia only 6 to 11 percent of people get complaints (Korenromp et al., Int J STD AIDS 2002, PMID 11839163), and about 70 percent of herpes and trichomonas infections run symptomless (Tuddenham et al., JAMA 2022, PMID 35015033). So you can feel completely fine and still have an STI and pass it on.
That sounds unfair, and it kind of is. Your body gives you no warning you can rely on.
Why do STIs often give no symptoms?
Many STIs settle in places that give little irritation, such as the cervix, the urethra, the throat or the anus. The immune system then does not always respond with obvious inflammation. In women, chlamydia therefore often goes unnoticed (Manavi, Best Pract Res Clin Obstet Gynaecol 2006, PMID 16934531).
| STI | Often symptomless? | Why it still counts |
|---|---|---|
| Chlamydia | Very often | Can ascend to the fallopian tubes |
| Gonorrhoea | Often (especially women) | Can cause inflammation |
| Trichomonas | Often | Keeps being passed on otherwise |
| HIV | Often after the first weeks | Early detection helps treatment |
| Syphilis | In the latent phase | Early treatment is simple |
Is testing without symptoms worthwhile?
Yes. Because complaints are so often absent, a test is the only reliable signal. The Dutch RIVM and the NHG-Standaard Het soa-consult specifically advise low-threshold testing when there is risk, even if you feel fine. That way you avoid silent harm and passing it to a partner.
What a test costs and whether it is reimbursed is covered separately. For the trade-off of testing without symptoms, see also STI test without symptoms.
How often should you get checked?
That depends on your situation. With a steady partner and no risk, regular testing is usually not needed. If you change partners or do not always use a condom, a periodic check is sensible, for example with a new partner or a few times a year.
When a test after a risk moment is reliable depends on the window period. You can read that in how soon do STI symptoms appear after exposure.
What harm can a silent STI cause?
An STI without complaints feels harmless, but it can continue in the background. Untreated chlamydia or gonorrhoea can ascend to the fallopian tubes in women and cause inflammation, which can affect fertility (Manavi, Best Pract Res Clin Obstet Gynaecol 2006, PMID 16934531).
In men too, a silent infection can cause inflammation of the epididymis. And as long as an STI stays unnoticed, it can be passed on to a partner.
The good news: caught in time, most bacterial STIs are simple to treat. Checking early prevents most silent harm.
Do you really never notice anything with a silent STI?
Sometimes there are very mild signals that you easily wave away: a day of more discharge, brief burning when you pee, or vague itching that fades again. Because it disappears quickly, you do not link it to an STI.
That is exactly why a risk moment, such as unprotected sex with a new partner, is a better reason to test than whether or not you have complaints.
Want to know how soon a test is reliable after such a moment, read how soon do STI symptoms appear after exposure.
Does a negative test mean you are completely safe?
Not always. A negative test is only reliable if you take it after the window period. If you test too early, an infection can still be missed, even without complaints. A negative result then gives false certainty.
A test also only covers the STIs you test for. So choose your package to fit your situation, and retest if in doubt after the window.
Want to compare your complaints or the testing moment for men or women, look at STI symptoms in women.
Where do you get checked anonymously?
Without symptoms, 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. For the most common STIs, the check for chlamydia, gonorrhoea and trichomonas is a logical start.
Want the full complaints overview first, go back to STI symptoms. Unsure about your complaints after a risk moment, do not wait too long and talk to your GP or the GGD.
Sources
- Korenromp EL, et al. What proportion of episodes of gonorrhoea and chlamydia becomes symptomatic? Int J STD AIDS. 2002. PMID 11839163
- Tuddenham S, Hamill MM, Ghanem KG. Diagnosis and Treatment of Sexually Transmitted Infections: A Review. JAMA. 2022. PMID 35015033
- Manavi K. A review on infection with Chlamydia trachomatis. Best Pract Res Clin Obstet Gynaecol. 2006. PMID 16934531
- RIVM, Sexual health and STIs. NHG-Standaard Het soa-consult. Thuisarts.nl.
This information is general and does not replace personal medical advice. Every STI test result at Discreet Test is reviewed by a BIG-registered doctor. Always discuss symptoms or treatment decisions with your GP, the GGD or a sexual health clinic.
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