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Chlamydia: Symptoms, Testing and Treatment in Houston

Updated · Sources are cited in the text

Chlamydia: Symptoms, Testing and Treatment in Houston

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.

Chlamydia is one of the most common bacterial sexually transmitted infections in the United States. It is also one of the easiest to treat once it is found. The challenge is that it often causes no symptoms at all, so many people only learn about it through a test.

This guide explains what chlamydia is, what the symptoms of chlamydia can look like, who should be tested, how testing works, and how chlamydia treatment works. It also covers partners, retesting and Texas rules, and where Houston residents can get tested for free or at low cost. It is written for every gender and orientation, and it is meant to be calm and practical.

Table of contents

  1. Key takeaways
  2. Chlamydia basics and the Houston picture
  3. Symptoms of chlamydia
  4. Who should be tested, and how testing works
  5. Is chlamydia curable? Chlamydia treatment explained
  6. Partners, retesting and Texas rules
  7. Where to get tested in Houston
  8. Sources

Key takeaways

  • The CDC says most people with chlamydia have no symptoms, so a test is the only way a clinician can tell.
  • Chlamydia is curable. A clinician prescribes antibiotics, and the CDC STI Treatment Guidelines (2021) set out the preferred options.
  • The USPSTF and the CDC recommend yearly screening for sexually active women under 25 and for older women at higher risk. The CDC also recommends regular screening for men who have sex with men. Clinicians use your anatomy and situation to decide on others.
  • The standard test is a nucleic acid amplification test (NAAT). It uses a urine sample or a swab.
  • The CDC recommends retesting about three months after treatment, even when partners were treated too.
  • Harris County public health clinics and Houston Health Department centers offer free or sliding-scale testing. Call ahead, because appointments are now encouraged at city sites.
  • In Texas, a minor of any age can consent to testing and treatment for a reportable infection such as chlamydia.

Chlamydia basics and the Houston picture

What chlamydia is

Chlamydia is caused by a bacterium called Chlamydia trachomatis. It spreads through vaginal, anal or oral sex, and it can pass from a pregnant person to a baby during birth. It can infect the genitals, the rectum and the throat. Ejaculation does not have to happen for it to pass between partners.

Anyone who has sex can get chlamydia, whatever their gender, orientation or number of partners. It is an infection, not a judgment about a person. Clinicians test for it every day, and a positive result is a routine medical matter.

Why finding it matters

Chlamydia that is not treated can lead to health problems over time. The CDC explains that in women it can spread to the uterus and fallopian tubes and cause pelvic inflammatory disease (PID). PID can lead to long-term pelvic pain, ectopic pregnancy and difficulty getting pregnant. In people with a penis, an untreated infection can sometimes cause painful inflammation near the testicles. The CDC also notes that a chlamydia infection can make it easier to get or pass HIV.

These outcomes are the reason screening exists. Finding chlamydia early, with a simple test, lets a clinician treat it before it causes harm.

How common it is in Houston and Texas

Local numbers show why testing is routine here. The Texas Department of State Health Services (DSHS) reported 31,406 chlamydia cases in Harris County in 2022, a rate of 656.9 per 100,000 people (Texas STD Surveillance Report 2022). For the same year, DSHS reported 156,131 cases across Texas, a rate of 519.9 per 100,000.

These are reported cases, so they reflect the people who were tested and diagnosed. They are not a measure of anyone's personal risk. A higher rate in a large county partly reflects how many people get tested. Both figures come from the same DSHS report for 2022, which is the latest published STD surveillance report on the DSHS reports page. Numbers for earlier or later years may differ.

Texas also requires chlamydia to be reported. The DSHS Texas Notifiable Conditions list for 2026 includes chlamydia, with reports due within one week. Reports go to public health authorities for tracking. Clinics also use them to make sure partner services are available.

Symptoms of chlamydia

Most people have no symptoms

The most important fact about the symptoms of chlamydia is that there are often none. The CDC says most people with chlamydia do not notice anything. Because of this, you cannot tell whether you have it from how you feel. Only a test can show it, and only a clinician can interpret the result.

If symptoms do appear, the CDC says they usually show up several weeks after sex with a partner who has chlamydia. Sometimes they appear later, and sometimes they never do. Someone can carry the infection for a long time without knowing.

Symptoms that can occur in the vagina or cervix

When symptoms occur in people with a vagina, the CDC lists these:

  • An unusual vaginal discharge, which may have a strong smell
  • A burning feeling when urinating
  • Pain during sex or bleeding after sex
  • Bleeding between periods
  • Lower belly or pelvic pain

Each of these has many possible causes, and most of them are not chlamydia. A clinician can sort out the cause with an exam and testing.

Symptoms that can occur in the penis or testicles

For people with a penis, the CDC lists:

  • Discharge from the penis
  • A burning feeling when urinating
  • Pain or swelling in one or both testicles, which is less common

Symptoms in the rectum and throat

Chlamydia can infect the rectum after receptive anal sex. The CDC lists rectal pain, discharge and bleeding as possible symptoms. Many rectal infections cause no symptoms.

Throat infections from oral sex are usually symptom-free as well. This is one reason testing is based on the kinds of sex you have, not just on how you feel.

Symptoms in other parts of the body

Chlamydia can also infect the eyes, usually through contact with infected genital fluids. This can cause redness, discharge or pain. In some cases, chlamydia is linked with joint inflammation. Both are uncommon, and a clinician is the right person to evaluate them.

When to contact a clinician

Reach out to a clinician or a clinic if you notice any of the symptoms above, if a partner tells you they tested positive, or if it has been a while since your last screening. You do not need symptoms to get tested. You also do not need to know which infection you are worried about. A clinician can work with you on what to test for.

Seek urgent care for severe lower belly pain, fever with pelvic pain, or sudden swelling and pain in a testicle. These can have causes that need quick attention, and they should not wait for a routine clinic visit.

Who should be tested, and how testing works

Screening recommendations

Screening means testing people who have no symptoms. Two sets of recommendations guide it. The USPSTF recommends screening for chlamydia in all sexually active women aged 24 years or younger, and in older women who are at increased risk. The CDC STI Treatment Guidelines (2021) say the same, and add several other groups:

  • Sexually active women under 25: yearly screening.
  • Women 25 and older with risk factors: yearly screening, with risk factors including a new partner, more than one partner, or a partner who has other partners or an STI.
  • Pregnant people: the CDC recommends screening at the first prenatal visit for those under 25 and for older people at increased risk, with repeat testing in the third trimester for those at higher risk.
  • Men who have sex with men: at least yearly screening at each site of contact, such as the urethra, the rectum and, for the throat, as the clinician advises. The CDC suggests more frequent screening, every three to six months, for those at higher risk.
  • Transgender and gender-diverse people: screening based on current anatomy and sexual behavior, as the clinician advises.
  • People with HIV: screening at the first HIV care visit and at least yearly after that, depending on risk.

For heterosexual men, the USPSTF and the CDC do not set a routine yearly screening schedule, because the evidence on benefit is less clear. That is not the same as saying a test is never useful. A clinician may recommend one based on symptoms, partners or your health history, and you can always ask for one.

Anyone with symptoms, anyone whose partner has chlamydia, and anyone who has questions about their risk can ask a clinician about a test. Your gender, orientation and relationship status do not change that.

The test: NAAT

The CDC recommends a nucleic acid amplification test, called a NAAT, for chlamydia. A NAAT looks for the genetic material of the bacteria, and it is the most sensitive type of test available. The sample can be:

  • A urine sample, often collected by you in a private restroom
  • A vaginal swab, which the CDC says can be collected by you or by a clinician
  • A swab from the rectum or throat, when those sites have been exposed

The test is not painful. If you are asked for urine, many clinics prefer that you not urinate for a short time beforehand, so check what your clinic recommends. The clinic will tell you how and when you will hear about your results.

When to test after sex

Testing too soon after an exposure can miss an infection. The CDC does not publish a single window period for chlamydia that fits every situation, so a clinician is the right person to say how soon a test makes sense for you. If you were recently exposed, tell the clinician when it happened. They may advise testing now and again later.

Testing more than one infection at once

Chlamydia often goes along with other infections, especially gonorrhea. Many clinics test for both together. A clinician may also suggest tests for HIV and syphilis, and hepatitis, depending on your history. You can ask what a visit will include before you go, and you can decline any test you do not want.

Understanding your results

A negative result means the test did not find chlamydia in the sample at the time it was taken. A positive result means the test found it, and a clinician will discuss treatment. A result can be affected by timing and sample type, so ask the clinician how to read yours. If you are unsure, retesting later can be part of the plan.

For free home options, DSHS runs Test for Texas, a free mail-order self-collection program open to anyone in Texas aged 13 and older, with no insurance needed. DSHS says the kit tests for HIV, syphilis, gonorrhea and chlamydia. The DSHS page explains how to order and what happens with results.

Is chlamydia curable? Chlamydia treatment explained

Yes, chlamydia is curable

Is chlamydia curable? Yes. The CDC states that chlamydia can be cured with the right antibiotics. This is a bacterial infection, so it responds to antibiotic treatment from a clinician. That is different from HIV, herpes and HPV, which are not curable but are treatable or manageable.

Treatment stops the infection from getting worse. It does not undo damage that has already happened, which is another reason early testing helps.

What chlamydia treatment looks like

Chlamydia treatment is a prescription from a clinician. The CDC STI Treatment Guidelines (2021) name doxycycline as the preferred antibiotic for most uncomplicated infections. They list azithromycin as an alternative, for example when doxycycline cannot be used. During pregnancy, the guidelines recommend azithromycin as the first choice.

The clinician decides which medicine and how long, based on the infection site, your health history, allergies and pregnancy status. This guide does not give amounts or schedules, because they should come from the person treating you. Take the medicine exactly as prescribed, and finish it even if you feel better.

Over-the-counter products and home remedies do not treat chlamydia. If you think you may have it, contact a clinic rather than waiting.

While you are being treated

The CDC advises people to avoid sex until treatment is complete and any partners have been treated. Your clinician will say how long to wait. Condoms and dental dams lower the chance of passing an infection, but they are not a substitute for waiting.

Side effects such as stomach upset can happen with antibiotics. Tell the prescriber if you have a reaction, if symptoms get worse, or if you cannot keep the medicine down. Do not stop without checking.

Treatment during pregnancy

Chlamydia in pregnancy can affect the baby. The CDC says it can be passed to the baby during birth and can cause eye infections or pneumonia in newborns. A prescribed antibiotic is safe for pregnancy when a clinician selects it. The CDC recommends a follow-up test about four weeks after treatment for pregnant people, plus another test within three months.

When symptoms continue

If you still have symptoms after finishing treatment, contact the clinician. Ongoing symptoms are often due to another cause, or to being exposed again by an untreated partner. The clinician may repeat the test or examine you.

Doxy-PEP and chlamydia

In 2024 the CDC issued guidance on doxycycline taken after sex, called doxy-PEP. The CDC recommends that clinicians discuss it with gay, bisexual and other men who have sex with men, and with transgender women, who have had a bacterial STI in the past 12 months. The CDC says it lowers the chance of syphilis and chlamydia, and lowers the chance of gonorrhea by a smaller amount.

Doxy-PEP is a prescription decision made with a clinician. It is not a replacement for regular testing. In Houston, Legacy Community Health lists DoxyPEP as a service at its Montrose location.

Partners, retesting and Texas rules

Telling partners

Anyone you had sex with in the recent past may need testing and treatment. The CDC says this applies to partners from the 60 days before symptoms began or before the positive test. If you have not had a partner in that time, the most recent partner is the one to tell.

This can feel hard. Plain language helps: you tested positive for chlamydia, it is treatable, and you would like them to get checked. Many people find it easier with a script from a clinician. Health departments can also notify partners without naming you, through partner services. Ask the clinic about this option.

Expedited partner therapy in Texas

Expedited partner therapy, or EPT, means a clinician can give a patient medicine or a prescription to pass to a partner, even if the clinician has not examined the partner. CDC's Legal Status of EPT in Texas page says Texas has no EPT statute. The legal basis is in administrative rules of the state:

  • A Texas Medical Board rule says a physician does not need a practitioner-patient relationship with the partner to prescribe STD medication for partners of an established patient (22 Tex. Admin. Code Sec. 190.8).
  • Advanced practice nurses may order or prescribe for partners of an established patient (22 Tex. Admin. Code Sec. 222.4).
  • Pharmacists may dispense a partner's prescription without a physician-partner relationship, and the partner's name is not required on the label (22 Tex. Admin. Code Sec. 291.29 and 291.33).

These rules allow it; they do not require a clinician to offer it. The CDC still prefers that partners be examined. If you are treated, ask your clinician whether EPT is available for your partner and whether the clinic can see the partner directly.

Retesting at three months

The CDC recommends that people treated for chlamydia be retested about three months after treatment. This is not because treatment usually fails. Reinfection is common, often from a partner who was not treated or from a new partner, and a repeat test finds it early. It applies even if you believe your partners were treated.

The CDC does not recommend a routine test shortly after treatment for most people, because the test can pick up leftover genetic material from bacteria that are no longer causing infection. Pregnancy is the exception noted above. Ask your clinician when they want the next test.

Privacy, minors and consent

Texas Family Code Sec. 32.003 lets a minor of any age consent to diagnosis and treatment of a reportable infectious disease, which covers chlamydia, other reportable STIs and HIV. Parent or guardian consent is not needed for that care. The same section allows a physician to tell a parent or guardian about the treatment, with or without the minor's consent. It is permitted, not required, so no clinic can promise that a parent will never be told.

The Houston Health Department also notes that Texas SB 1188, effective September 1, 2025, gives parents and guardians access to the electronic health record of a child aged 0 to 17. Teens who have questions about privacy can ask a clinic before the visit how their records and portal accounts are handled.

Chlamydia results are also reported to the health department as required by law. This is for public health tracking and partner services, and it is not shared with employers or the public.

Common questions

Can chlamydia go away without treatment?

The CDC does not recommend waiting, because untreated infections can cause complications and continue to pass to partners. A clinician can treat it with a prescription.

Can I get chlamydia again after being treated?

Yes. Treatment cures the infection that was there, but it does not protect against future exposures. This is why the CDC recommends retesting at about three months.

Does a negative test mean I can skip future screening?

A negative result reflects the time of the test. New partners or new exposures can change things, so ask a clinician how often screening makes sense for you.

Does chlamydia affect fertility?

The CDC explains that untreated chlamydia in women can lead to PID and make it harder to get pregnant later. Prompt treatment lowers that risk. If you have concerns about fertility, a clinician can talk through them.

Where to get tested in Houston

Houston has several public and community options. A longer list with notes on cost and services is on the page about where to get tested in Houston and what it costs. The clinics below are the ones whose own pages describe chlamydia or STI testing. Services and hours change, so call before you go.

Houston Health Department health centers

The Houston Health Department offers STD testing and treatment at three locations. Cost is on a sliding scale. The department's pages describe STD walk-in services, with PrEP and nPEP by appointment at 832-395-9800. The department says that from September 1, 2026, appointments are encouraged and walk-ins are seen as capacity permits, so a walk-in visit is not guaranteed. The department's pages do not list hours here, so check by phone at 832-393-4220.

Harris County Public Health Antoine Clinic

Harris County Public Health lists STI testing for HIV, syphilis, gonorrhea and chlamydia, PrEP prescriptions and STI treatment at its Antoine Clinic, at 5815 Antoine Dr, Houston, TX 77091. Services are listed as free, and walk-ins are welcome. The phone number is 832-927-7350.

The county lists hours as Monday through Thursday, 8am to 7pm, closed Friday, and every other Saturday, 8am to 2pm. The county page also advises confirming before you visit. Read more on the Harris County Public Health HIV and STI prevention page.

Legacy Community Health, Montrose

Legacy Community Health, a federally qualified health center, runs a clinic at 1415 California St., Houston, TX 77006. Phone: (832) 548-5100. Legacy says HIV, syphilis and hepatitis C testing are free on a walk-in basis, and that its services are open to all regardless of ability to pay. Full STI panels, which would include chlamydia testing, are available as appointments permit, and Legacy lists an express STI testing option for uninsured patients without symptoms. Legacy's pages do not state pricing for the full panel, so ask when you call. Legacy also lists treatment, PrEP, PEP and DoxyPEP at this location. See the Legacy HIV and STD screening page.

Sites that focus on HIV and syphilis testing

Avenue 360 Health & Wellness offers free walk-in rapid HIV, hepatitis C and syphilis testing at its Heights and Midtown locations, Monday through Friday, 8:30am to 4:30pm. The Montrose Center, at 401 Branard Street, lists free walk-in rapid HIV, hepatitis C and syphilis testing, Monday through Thursday, 9am to 2pm. These pages do not describe chlamydia testing, so if chlamydia is your main concern, ask by phone first or choose one of the sites above.

Testing at home or where you are

  • Test for Texas, a DSHS program, offers a free mail-order self-collection kit for HIV, syphilis, gonorrhea and chlamydia to anyone in Texas aged 13 and over. Details are on the DSHS self-collection page.
  • Testing123 from Harris County Public Health sends staff to a location you choose in Harris or Montgomery County for HIV and syphilis testing. That service is not a chlamydia test.

A national testing finder

The CDC also runs gettested.cdc.gov, where you can enter your ZIP code to see testing sites. Ask each site what it tests for, since not every site offers every test.

Preparing for your visit

  • Call first to confirm hours, appointments and which tests are included.
  • Ask what the visit costs and whether a sliding scale or assistance applies to your situation.
  • Bring photo identification if the clinic asks for it, and your insurance card if you have one. Many public clinics see people without insurance.
  • Tell the clinician about symptoms, recent partners and the kinds of sex you have, so the right sites are tested.
  • Ask when and how you will get your results, and who will contact you.

Chlamydia is common, found with a simple test, and curable with antibiotics from a clinician. If it has been a while since your last screening, or if you have questions about your own situation, a call to one of the clinics above is a good next step.

Sources