This page is general health information, not medical advice. It cannot tell you whether you have an infection. A clinician can, and the testing options on this site are a good place to start.

Oral sex can pass some infections to the throat, and most of the time the throat shows no sign of it. That is why an STD in the throat is easy to miss and worth understanding. This page answers common questions about oral STD symptoms, who might ask about throat testing, and what San Antonio readers can do next.

Nothing here can tell you whether you have an infection. Only a clinician and a lab test can do that.

The basics

Can you get an STD in your throat?

Yes. The CDC says gonorrhea, chlamydia, syphilis, herpes and HPV can all be passed through oral sex and can affect the mouth or throat. HIV can also be passed through oral sex, though the CDC describes that risk as much lower than from other types of sex.

Which STIs most often infect the throat?

Gonorrhea is the one clinicians most often talk about, followed by chlamydia. Herpes (HSV-1 and HSV-2), syphilis and HPV can also involve the mouth or throat. Each one is handled differently, so the type of test depends on the infection being checked.

How does an infection reach the throat?

It passes through contact between the mouth or throat and a partner's genitals, anus or sometimes a sore. It can happen with any combination of partners, whatever gender or orientation. Barriers such as condoms and dental dams lower the chance, according to the CDC.

Can a throat infection spread to other parts of the body?

It can pass to a partner's genitals or anus during sex, and the reverse is also possible. The CDC notes that untreated gonorrhea and chlamydia can lead to complications, so a clinician's evaluation matters. A lab test is the only way to know what is going on.

Oral STD symptoms

What are the usual oral STD symptoms?

The CDC says throat infections from gonorrhea or chlamydia often cause no symptoms at all. When symptoms appear, they can include a sore throat, redness or discomfort when swallowing. Sores, blisters or white patches in or around the mouth can point to other infections, such as herpes or syphilis.

Why do most throat infections have no symptoms?

Bacteria in the throat often do not cause enough irritation to notice. The CDC describes many pharyngeal gonorrhea and chlamydia infections as symptom-free. A sore throat can also come from a cold, allergies, strep or reflux, so symptoms alone cannot sort out the cause.

Does a sore throat mean it is an STD?

Not on its own. Most sore throats have other causes. If a sore throat lasts, or follows a recent partner or exposure, a clinician can decide which tests make sense.

What do mouth sores from herpes or syphilis look like?

Oral herpes usually appears as clusters of small blisters that break open into sores. The CDC says the first stage of syphilis can cause a firm, usually painless sore, which can occur inside the mouth. Both can look like other conditions, so a clinician's exam and testing give a clearer answer.

What about HPV in the mouth or throat?

The CDC says oral HPV infection usually causes no symptoms and often clears on its own. Some high-risk HPV types can, over many years, lead to cancers at the back of the throat. The CDC recommends HPV vaccination as routine for preteens, with catch-up through age 26. People aged 27 to 45 can talk with a clinician about whether it fits them.

Testing for an STD in the throat

How is the throat tested?

For gonorrhea and chlamydia, a clinician or the person being tested rubs a swab over the back of the throat. The swab goes to a lab, which uses a nucleic acid amplification test. Blood tests are used for syphilis and HIV, and a sore can be sampled for herpes.

Does a urine test check the throat?

No. A urine or genital sample checks only that site. The CDC's treatment guidelines describe testing at each site of sexual contact, which can include the throat, because an infection can be present in one place and not another.

Who might be offered a throat swab?

The CDC guidelines recommend throat testing for gonorrhea at least yearly for men who have sex with men who report oral sex. Others may be offered it based on their sexual history. A clinician can say what applies, and you can ask about it at any visit.

How long after an exposure should I wait to test?

It depends on the infection. For HIV, the CDC says a lab antigen/antibody blood test can detect it about 18 to 45 days after exposure. Fingerstick and self-tests have a longer window, up to 90 days. For other infections, ask the testing clinic when a result would be reliable.

How are throat infections treated?

Gonorrhea, chlamydia and syphilis are curable with treatment a clinician prescribes. Herpes and HIV are not curable but are treatable and manageable with medical care. The CDC guidelines recommend a follow-up test after treatment for throat gonorrhea, so ask your clinician about that step.

What is doxy-PEP, and does it relate to oral STDs?

Doxy-PEP is a prescription antibiotic taken after sex. The CDC's 2024 guidance recommends that clinicians discuss it with gay and bisexual men and transgender women who had a bacterial STI in the past year. It is a clinician's decision, and the CDC notes it does not protect against every infection.

Getting tested in San Antonio

Which San Antonio clinics test the throat?

The clinic pages we reviewed list gonorrhea and chlamydia testing but do not say whether a throat swab is offered. Call before you go and ask directly: "Do you offer a throat swab for gonorrhea and chlamydia?" The local testing list has contact details for each option.

Where can I get free or low-cost testing?

The San Antonio AIDS Foundation lists free rapid HIV, syphilis, gonorrhea and chlamydia testing at 818 E. Grayson Street, (210) 225-4715, with no appointment needed. The Alamo Area Resource Center lists free testing for HIV, hepatitis C, syphilis, gonorrhea and chlamydia at 303 N. Frio, (210) 625-7200. It accepts walk-ins Monday to Friday, 8 a.m. to 4:30 p.m., and until 8 p.m. on Wednesday.

What does the Metro Health clinic offer?

The San Antonio Metropolitan Health District runs an STI Walk-In Clinic at 512 E. Highland, Suite 150, (210) 207-8830. Metro Health lists a $15 office visit administrative fee, with other fees varying by service. It requires a photo ID and does not test anonymously. Hours are Monday to Thursday 7:45 a.m. to 4:30 p.m. (latest check-in 3 p.m.) and Friday 7:45 a.m. to noon (latest check-in 10:30 a.m.), and check-in may close early when the clinic is full.

Are there other options if I want treatment too?

Kind Clinic lists walk-in HIV and STI testing and STI treatment at 730 Isom Road, with a general line at 833-937-5463. CommuniCare lists STD and HIV testing with a sliding fee for eligible self-pay patients, at (726) 224-3438. For the full picture, see our guide to STD testing in San Antonio.

Can I test from home?

Texas DSHS runs Test for Texas, which mails free HIV, syphilis, gonorrhea and chlamydia kits to anyone in Texas aged 13 or older at testfortexas.org. The program page does not say whether the kits include a throat swab, so check before you order. You can also search for sites on the CDC's GetTested locator.

Can a teenager get tested without a parent?

Texas Family Code Sec. 32.003 lets a minor of any age consent to diagnosis and treatment of a reportable infectious disease, which covers reportable STIs and HIV. A physician may, but is not required to, tell a parent or guardian. Ask the clinic about its own privacy practices before the visit.

How common are STIs in San Antonio?

The Texas DSHS 2022 STD Surveillance Report counted 5,983 gonorrhea cases in Bexar County, a rate of 290.5 per 100,000 people. The Texas rate that year was 207.0 per 100,000. These figures count reported infections at any site, not throat infections specifically.

Next steps

Testing is a routine health check, and none of it calls for shame. If any question here sounds like your situation, a clinician can help you pick the right tests. Women's health questions are covered in our guide to STD symptoms in women. Please check hours and services by phone, since clinics can change them.

Oral and Throat STDs: Symptoms and Testing