STI symptoms
Most people arrive at testing because something changed. Organising symptoms by what you actually noticed is more useful than a list of infection names.
Diagnik Health Library · Updated
Unusual discharge, burning or pelvic pain
This cluster points towards chlamydia, gonorrhea and trichomoniasis, which is why they are usually tested together. Bacterial vaginosis, yeast infections and urinary tract infections cause the same picture, so a negative test with continuing symptoms still deserves a clinical opinion.
A sore, ulcer or unexplained rash
A painless genital, anal or oral sore, or a rash on the palms or soles, points towards syphilis. Herpes also causes sores, and we do not sell a test for it — a clinician can swab a lesion directly.
Flu-like illness after a possible exposure
A short fever, sore throat and swollen glands two to four weeks after a possible exposure can occur in acute HIV, but is far more often an ordinary virus. Testing on the right schedule is the answer; symptoms are not.
Nothing at all
This is the most common presentation for chlamydia, gonorrhea and trichomoniasis, and HIV and syphilis can be silent for years. No symptoms is a normal reason to screen, not a reason to skip it.
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
- Which STI causes painless sores?
- A painless sore is characteristic of primary syphilis, though other conditions can cause lesions too. Testing is how you tell.
- Can a UTI be mistaken for an STI?
- Yes. Burning when urinating is common to both, which is why testing rather than guessing is the sensible route.
Not sure which test you need?
Three questions, about a minute, and one clear recommendation. No account needed.
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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.