Chlamydia in Bangkok: symptoms, how you catch it, and treatment

Clinically reviewed by Dr. Ponlawat Pitsuwan, Physician, Doctor Bangkok. Last reviewed: July 2026

If you are reading this after a sexual encounter in Bangkok and something feels off, or nothing feels wrong but you are worried anyway, you are in the right place. Chlamydia is one of the most common infections I see at this clinic. The single biggest problem with it is that most people do not know they have it. No symptoms, no warning, no obvious sign that anything is wrong. You only find out when you test, or when complications show up later.

The good news is that chlamydia is curable. A short course of antibiotics clears it. The bad news is that untreated infection can quietly cause damage for months. This guide covers what to watch for, when to test, and exactly what to expect if you come in.

Can You Have Chlamydia with No Symptoms?

Yes, and this is the most important thing to know. Most people infected with chlamydia never notice anything unusual. No discharge, no pain, no burning. Nothing at all.

This is not rare. It is actually the norm. That is why I recommend routine testing rather than waiting for symptoms to appear. If you have had unprotected sex with a new partner, testing is the only way to know for sure.

Chlamydia Symptoms in Men and Women

When symptoms do show up, they usually appear one to three weeks after exposure. Some people go months without any signs.

Symptoms in men

The most common thing men notice is discharge from the tip of the penis. It may be clear, white, or slightly cloudy. Burning when you urinate is another common sign. Some men get pain or swelling in one or both testicles. Left untreated, this can affect fertility.

Symptoms in women

Women often feel nothing at all, which makes chlamydia particularly risky. When symptoms do occur, they include unusual vaginal discharge, burning when urinating, pain during sex, and bleeding between periods or after sex. Low belly pain can mean the infection has spread to the reproductive organs, a condition called pelvic inflammatory disease, or PID.

Rectal and throat chlamydia

This is something many health websites skip over. If you have had anal or oral sex, chlamydia can infect the rectum or throat. Rectal chlamydia may cause discomfort, discharge, or bleeding, but often causes no symptoms at all. Throat chlamydia is almost always silent. A urine test alone will miss these sites. You need swabs from the right places.

How Soon After Exposure Should You Test?

This is one of the most common questions I get. The honest answer is: not immediately. Testing too soon can give you a false negative, because the infection has not yet built up enough to be detected.

The right time is around two weeks after the encounter. If your first test comes back negative but you are still concerned, repeat the test at six weeks. At Doctor Bangkok, we advise you on timing during your consultation so you are not testing too early and getting a false sense of reassurance.

How Chlamydia Is Diagnosed

For most people, the test involves a urine sample. If you have had anal or oral sex, we also take rectal and throat swabs. This matters because those sites can be infected even when the urine result is negative.

Our confidential STD testing in Bangkok covers all relevant sites based on your history. We do not assume. We ask about your specific exposures and test accordingly.

Chlamydia Treatment in Bangkok

Chlamydia is curable with antibiotics. That word, curable, is the key one. This is not a condition you manage for life. You take a course of antibiotics, the infection clears, and you move on.

Which antibiotic?

The current standard is a seven-day course of doxycycline. Updated CDC guidelines from 2021 prefer this over single-dose azithromycin, which some older sources still recommend. Single-dose azithromycin is less reliable for rectal infections. If you have a rectal infection and take a single dose, there is a real chance it will not fully clear. Doxycycline over seven days works more reliably across all infection sites.

Azithromycin is still used in certain situations, including pregnancy. Your doctor will choose based on where the infection is and your medical history.

During treatment

Do not have sex, including oral sex, until you and your partner have both finished treatment and confirmed you are clear. Skipping this step is the most common reason for reinfection.

What Happens If Chlamydia Is Left Untreated?

No symptoms does not mean no consequences. I want to be direct about this.

In women, untreated infection can spread to the uterus and fallopian tubes, causing PID. This can lead to chronic pelvic pain, difficulty getting pregnant, or an ectopic pregnancy, which is a pregnancy outside the uterus and is life-threatening. In men, untreated chlamydia can cause epididymitis and, over time, affect sperm quality. Untreated chlamydia also increases susceptibility to HIV. An active infection makes it easier for HIV to take hold during an exposure.

Chlamydia and Co-Infections

Chlamydia often comes with company. Gonorrhoea and chlamydia are frequently found together, which is why most clinics test for both at the same time. If you have one, you may well have the other. A full sexual health screen checks for multiple infections in a single visit.

Getting Tested and Treated in Bangkok

Finding a clinic in Bangkok where you can speak openly in English, without judgment, is not always straightforward. At Doctor Bangkok on Sukhumvit Soi 13, accessible from BTS Nana, you do not need an appointment. You can walk in, speak with an English-speaking doctor, and get tested the same day. Results are shared with you confidentially.

For patients who prefer not to come to the clinic, we offer a discreet consultation at your hotel. If you have already returned home and are worried about an exposure, you can contact us to discuss your options remotely.

Partner Notification and Preventing Reinfection

If your test comes back positive, your recent sexual partners need to know. An untreated partner will reinfect you. The general guideline is to notify anyone you had sexual contact with in the 60 days before your diagnosis.

In some situations, your partner can receive treatment without seeing a doctor themselves. Ask about this option during your consultation. After you finish treatment, a follow-up test to confirm the infection has cleared is recommended, especially for rectal chlamydia. At Doctor Bangkok, we schedule this as part of your care.

FAQ

Can I get tested for chlamydia discreetly in Bangkok without an appointment?

Yes. Doctor Bangkok’s clinic on Sukhumvit Soi 13 is open 24 hours and does not require an appointment. If you would rather not come in, we can arrange confidential testing at your hotel. Results are delivered privately and the consultation is entirely non-judgmental.

How soon after unprotected sex should I get tested for chlamydia?

Wait at least two weeks before testing. Testing too early can produce a false negative because the infection needs time to reach detectable levels. If your first result is negative but you are still concerned, retest at six weeks. A doctor can help you decide the right timing based on your specific exposure.

What is the difference between doxycycline and azithromycin for chlamydia?

Both are antibiotics that treat chlamydia, but a seven-day course of doxycycline is now the preferred option based on updated CDC guidance from 2021. Single-dose azithromycin is less effective for rectal infections. Azithromycin is still used in pregnancy, and your doctor will choose based on where the infection is and your medical history.

Can chlamydia clear up on its own without treatment?

No, not reliably. Untreated chlamydia can cause PID, infertility, epididymitis, ectopic pregnancy, and increased HIV risk. Antibiotic treatment cures the infection. Waiting causes harm that may not be reversible.

I had a sexual encounter in Bangkok and I am worried. What should I do?

Note the date of the encounter so you can time your test correctly. Avoid further sexual contact until you are tested and cleared. Visit the clinic or arrange a hotel consultation with Doctor Bangkok. No appointment, no ID, and no judgment. Same-day confidential STD testing in Bangkok is available when you need it.

Does a urine test pick up all types of chlamydia?

No. A urine test only detects chlamydia in the urethra. If you have had anal or oral sex, you also need rectal and throat swabs. Many clinics skip these unless you ask. At our sexual health clinic, we ask about your full history and test every relevant site.

Can I have chlamydia and gonorrhoea at the same time?

Yes. These two infections frequently occur together. That is why a full sexual health screen tests for both, along with other STIs, in a single visit. If you have one, it is worth checking for the other.