Getting checked for STIs is straightforward: you can visit a primary care doctor, a sexual health clinic, or an urgent care center and simply ask for STI testing. In many cases, you can also order an FDA-approved home test kit. The process typically involves a urine sample, a blood draw, a swab, or some combination of the three, depending on which infections you’re being tested for.
What trips most people up isn’t the testing itself but knowing what to ask for, where to go, and when results will actually be accurate. Here’s everything you need to know.
A Pap Smear Is Not an STI Test
One of the most common misconceptions is that a routine gynecological exam or Pap smear covers STI testing. It does not. A standard Pap smear screens only for signs of HPV-related cervical changes, not for chlamydia, gonorrhea, syphilis, herpes, or HIV. Those all require separate tests that you need to specifically request.
This means you could go to annual well-woman visits for years and never be screened for common infections unless you bring it up. If you want STI testing, say so clearly when you schedule or at the start of your appointment.
What Each Test Actually Involves
STI testing isn’t one single test. It’s a combination of methods matched to specific infections. Here’s what to expect:
- Urine sample: Used for chlamydia and gonorrhea. You pee in a cup. That’s it.
- Blood draw: Used for HIV, syphilis, hepatitis B, and hepatitis C. A herpes blood test also exists, though it’s not part of routine screening.
- Swabs: A vaginal swab can test for chlamydia, gonorrhea, and trichomoniasis. If you’ve had oral or anal sex, throat and rectal swabs can catch infections that a urine test would miss entirely. Chlamydia and gonorrhea can live in the throat or rectum without causing symptoms, so a standard urine-only test won’t detect them there.
- Visual exam: A provider may diagnose herpes by examining blisters or sores directly. They can also swab an active blister (one that hasn’t crusted over) for a more definitive result. Genital warts from HPV are similarly diagnosed by appearance.
If you’ve had oral or anal sex, tell your provider so they can order the right swabs. Many clinics default to urine-only testing, which leaves infections at other sites completely undetected.
When to Get Tested After Exposure
Testing too soon after a potential exposure can produce a false negative. Every infection has a “window period,” the time it takes to become detectable. Going in the day after unprotected sex won’t give you reliable results for most infections.
- Chlamydia and gonorrhea: Detectable for most people within 1 week; nearly all cases show up by 2 weeks.
- Syphilis: A blood test catches most cases by 1 month, but can take up to 3 months to detect nearly all infections.
- HIV (blood test): Antigen/antibody blood tests catch most cases by 2 weeks, with near-complete accuracy at 6 weeks. An oral swab test takes longer: about 1 month to catch most cases, 3 months for near-complete accuracy.
- Herpes: Antibody blood tests catch most infections by 1 month, though it can take up to 4 months for the result to be fully reliable.
- Trichomoniasis: Usually detectable within 1 week; nearly all cases by 1 month.
- Hepatitis B: 3 to 6 weeks.
- Hepatitis C: About 2 months for most cases, up to 6 months for near-complete accuracy.
If you test negative but it’s been less than the full window period, consider retesting once enough time has passed. A negative result at 5 days doesn’t mean much for syphilis or HIV.
Who Should Get Tested and How Often
CDC screening guidelines are more specific than most people realize. They don’t just say “get tested if you’re worried.” They lay out clear recommendations by age, sex, and risk level:
All adults ages 13 to 64 should be tested for HIV at least once. All adults over 18 should be screened for hepatitis C at least once. Women under 25 who are sexually active should get annual chlamydia and gonorrhea testing. Women 25 and older should get those same tests if they have new or multiple partners or other risk factors.
Men who have sex with men face a more intensive schedule: at least annual screening for chlamydia, gonorrhea, syphilis, and HIV. If you’re on PrEP, are HIV-positive, or have multiple partners, every 3 to 6 months is recommended. People living with HIV should be screened for chlamydia, gonorrhea, and syphilis at their first evaluation and at least annually after that.
Pregnant women should be tested for chlamydia, gonorrhea, syphilis, HIV, and hepatitis B at their first prenatal visit, with repeat testing in the third trimester for syphilis, HIV, and hepatitis B if risk factors are present.
Where to Go
You have several options, and the best one depends on your insurance situation and comfort level:
- Your primary care doctor or OB-GYN: Can order any STI test. You just need to ask.
- Sexual health or STI clinics: Often provide free or low-cost testing, especially for uninsured individuals. Many offer walk-in appointments. The CDC’s GetTested.cdc.gov tool lets you search for clinics by zip code.
- Urgent care centers: Most can run basic STI panels, though they may not offer throat or rectal swabs.
- Home test kits: FDA-approved self-collection options exist for HIV, syphilis, chlamydia, and gonorrhea. You collect your own sample (a vaginal swab, urine, or finger-prick blood, depending on the kit) and mail it to a lab. One FDA-authorized home test for chlamydia, gonorrhea, and trichomoniasis correctly identified 97.2% to 100% of positive samples and 98.5% to 99.1% of negative samples in clinical studies, making accuracy comparable to in-clinic testing.
If you’re not comfortable talking to your regular doctor about STIs, dedicated sexual health clinics are designed for exactly that conversation. Their staff do this all day, and the visit is typically confidential.
Privacy and Reporting
STI test results are medical records and are protected by privacy laws. However, certain infections are legally reportable to your local or state health department: chlamydia, gonorrhea, syphilis (including congenital syphilis), chancroid, and HIV must be reported in every state. This reporting is used for public health tracking, not to notify employers or family members. The reports themselves are kept confidential and protected by statute in most jurisdictions.
Some clinics offer anonymous HIV testing, where your name is never attached to the result. Confidential testing, which is far more common, means your name is on file but protected. If anonymity matters to you, ask the clinic which type they offer before your visit.
What Happens If a Test Comes Back Positive
Most common STIs are curable with antibiotics. Chlamydia, gonorrhea, syphilis, and trichomoniasis all fall into this category. You’ll typically receive a prescription and be asked to abstain from sex until treatment is complete and the infection has cleared.
Your sexual partners need to be treated too, or you risk reinfection. In 48 states plus Washington, D.C., a practice called expedited partner therapy allows your provider to write a prescription for your partner without requiring them to come in for their own appointment. This makes it easier to get partners treated quickly, especially when they can’t or won’t visit a clinic themselves.
For viral infections like HIV and herpes, treatment focuses on managing the virus long-term rather than curing it. Antiviral medications can suppress herpes outbreaks and make HIV effectively untransmittable when taken consistently. A positive result for either of these is not the crisis it once was, but it does mean ongoing care.
Hepatitis B has a vaccine and is often cleared by the body on its own, while hepatitis C is now curable with a course of antiviral treatment that takes 8 to 12 weeks in most cases.
How to Ask for the Right Tests
Walking into a clinic and saying “I want to get tested for everything” sounds thorough, but providers interpret that differently. There is no universal “full panel” that every clinic runs the same way. Some will only test for chlamydia and gonorrhea via urine. Others will include HIV and syphilis blood work. Very few will automatically add herpes, hepatitis, or extragenital swabs unless you ask.
Be specific. Tell your provider which body parts were involved (oral, anal, vaginal), whether a condom was used, and how recently the exposure happened. This lets them choose the right tests and collection sites. If you want herpes testing, request it by name, because it’s almost never included in routine screening. The same goes for hepatitis C and trichomoniasis, which are easy to overlook if no one brings them up.