When should I get tested?
Testing at the wrong moment produces a result you cannot rely on. These are the situations where testing is worthwhile, and when to do it.
Diagnik Health Library · Updated
Four reasons to test
- A new partner, or before deciding to stop using condoms in a relationship.
- A specific possible exposure — timed to the window period for the infection.
- Symptoms that have appeared and not resolved.
- Routine screening, even with nothing unusual going on.
What guidance recommends
The CDC recommends everyone aged 13 to 64 is tested for HIV at least once, with more frequent testing for people with new or multiple partners or who share injection equipment, and routine chlamydia and gonorrhea screening for sexually active young women. Prenatal syphilis screening is standard care.
Timing after an exposure
Bacterial and parasitic infections become detectable within days to a couple of weeks. Antibody tests for HIV and syphilis need longer — up to about three months for HIV antibodies. If your exposure was within 72 hours, ask a clinician about PEP straight away.
Tests mentioned in this guide
OraQuick In-Home HIV Test
An HIV answer at home, in 20 to 40 minutes, with no blood.
First To Know Syphilis Test Kit
A single drop of blood, a syphilis answer in 15 minutes.
Visby Women's Sexual Health Test
Three common infections from one self-collected swab, in about 30 minutes.
Frequently asked questions
- How often should I be tested?
- At least once for HIV for everyone aged 13 to 64, and more often — commonly with each new partner — if you have ongoing risk.
- Should I test if I have no symptoms?
- Yes. Most chlamydia, gonorrhea and trichomoniasis infections are symptom-free, so screening is the only way to find them.
Not sure which test you need?
Three questions, about a minute, and one clear recommendation. No account needed.
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STI testing
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Can you have an STI without symptoms?
Yes — and for several infections, silence is the normal presentation.
Related testing pages
Sources
Educational information only, not a medical diagnosis or treatment advice. Screening results always need confirmation by a clinician.
This guide is general health information about screening tests. It is not a diagnosis and does not replace care from a clinician. See our medical disclaimer.