STDs in Thailand: Risks, Testing & Treatment

STDs in Thailand: What You Need to Know Before and During Your Visit

Thailand welcomes tens of millions of visitors every year, and for many people, part of the appeal is the country's vibrant social scene. That openness also comes with real public health considerations. Sexually transmitted diseases — STDs — remain a significant concern in Thailand, not just for travellers but also for residents, expats, and people living and working across the country.

This article gives you honest, up-to-date information: what STDs are common in Thailand, who is most at risk, what symptoms to watch out for, how to protect yourself, and where to get tested or treated. No judgement. Just the facts you need to stay safe.

The STD Landscape in Thailand

Thailand has long faced a higher-than-average burden of sexually transmitted infections compared to many other countries in the region. A combination of factors — including international travel, urbanisation, population mobility, and varying levels of sexual health awareness — contributes to ongoing STD transmission.

The infections generating the most concern are HIV/AIDS, syphilis, gonorrhoea, and chlamydia. Each carries its own set of risks, and in some cases, complications from untreated infections can be life-changing.

HIV in Thailand

Thailand has one of the highest rates of HIV in Asia, with an estimated number in Thailand closer to 500,000–560,000 people living with the virus out of a population of roughly 70 million. Thailand continues to have one of the highest HIV burdens in Southeast Asia. HIV primarily affects men who have sex with men (MSM), sex workers, and people who inject drugs, though it is by no means limited to these groups.

HIV disproportionately affects men who have sex with men (MSM), transgender women, sex workers, and people who inject drugs. Regular testing, PrEP, and early treatment remain essential prevention strategies. Among female sex workers, the figure stands at approximately 10%. These numbers underline the need for regular testing and consistent prevention, especially for anyone whose lifestyle involves higher-risk sexual contact.

The good news is that HIV treatment has advanced enormously. People living with HIV who take antiretroviral therapy (ART) consistently can reach an undetectable viral load — meaning the chance of passing the virus to a partner drops to essentially zero.

Syphilis: A Sharp Rise

Syphilis cases in Thailand have climbed dramatically over the past decade. In 2009, around 2 to 3 people per 100,000 were diagnosed with syphilis. By 2023, that figure had risen to nearly 12 per 100,000. Young adults between the ages of 15 and 24 are now among the most commonly diagnosed groups.

What makes syphilis particularly tricky is how it spreads. Most people associate STD transmission with penetrative sex, but syphilis can pass through direct skin-to-skin contact with an infected sore — meaning condoms alone may not offer full protection if the sore is in an area the condom does not cover. It can also spread through kissing in certain circumstances.

Syphilis progresses through stages. The first produces a painless sore called a chancre at the site of infection — often on the genitals, rectum, mouth, or even the fingers. Because it is typically painless, many people never notice it. The sore heals on its own, which can create a false sense of security. The bacteria, however, are still in the body.

Left untreated, syphilis can eventually damage the nervous system, heart, and other vital organs. Caught early, it is cured with a single penicillin injection.

Gonorrhea and Chlamydia

Both gonorrhoea and chlamydia have been rising steadily in Thailand across all demographics. A significant number of people infected with either disease have no symptoms at all — up to 80% of chlamydia infections are estimated to be asymptomatic.

When symptoms do appear, they can include unusual discharge from the penis, vagina, or rectum; pain or burning during urination; or throat soreness in those who have had oral sex. If left untreated, both infections can lead to serious complications, including infertility, pelvic inflammatory disease, and pregnancy complications.

A growing concern with gonorrhoea specifically is antibiotic resistance. Gonorrhoea has shown an increasing ability to survive treatments that once worked reliably, which makes early detection and proper medical guidance more important than ever.

Who Is Most at Risk of STDs in Thailand?

While anyone sexually active can contract an STD, certain behaviours and situations raise the risk considerably. Travellers who engage in casual sex — particularly with multiple partners or sex workers — face a higher likelihood of exposure. Long-term travellers, expats, and military personnel stationed in Thailand have historically been identified as higher-risk groups.

Heavy alcohol or drug use also plays a role, as impaired judgement makes it harder to make thoughtful decisions about protection. A sense of distance from normal social norms while abroad can also lead some people to take risks they would not consider at home.

Prevention: What Actually Works

• Use condoms correctly and consistently. Condoms are highly effective against many STDs, but are not perfect. They offer less protection against infections spread through skin-to-skin contact, such as herpes, HPV, and syphilis.
• Take PrEP if you are at risk of HIV: Pre-exposure prophylaxis is a daily medication up to 99% effective at preventing HIV when taken as prescribed. Available at PULSE Clinic.
• Use PEP if you had unprotected sex: Post-exposure prophylaxis must be started within 72 hours of potential exposure and involves a 28-day course of antiretroviral medication.
• Consider DoxyPEP for bacterial STDs: A dose of doxycycline taken within 72 hours after unprotected sex has shown meaningful results in reducing new syphilis and chlamydia infections among MSM.
• Get vaccinated: Vaccines for Hepatitis B and HPV are available at PULSE Clinic and offer strong, long-lasting protection.
• Test regularly: If you have multiple partners or are sexually active in higher-risk settings, testing every three months is a practical standard.

Testing and Treatment at PULSE Clinic

PULSE Clinic is one of Asia's leading sexual health clinics, with locations across Thailand — Silom, Nana (Sukhumvit 13), Asoke, and Phromphong in Bangkok, as well as Patong (Phuket), North and South Pattaya, Koh Samui, and Nimman (Chiang Mai).

Services include full STD screening and treatment, HIV testing and antiretroviral care, PrEP and PEP prescriptions, DoxyPEP consultations, and Hepatitis B and HPV vaccinations. All consultations are confidential and non-judgemental.

Frequently Asked Questions (FAQs)

Is my visit to the clinic completely confidential?

Yes. At PULSE Clinic, your privacy is our priority. We follow strict medical confidentiality standards, and your health information is never shared without your consent, except where required by law. Our clinics are designed to provide a discreet, professional, and non-judgemental environment for all patients.

Can I get tested if I have no symptoms?

Absolutely. Many sexually transmitted infections, including chlamydia, gonorrhoea, and HIV, may not cause symptoms in their early stages. Regular testing is one of the most effective ways to protect your health and reduce the risk of unknowingly passing an infection to others. If you have multiple partners or are sexually active in higher-risk settings, testing every three to six months is generally recommended.

Do I need an appointment, or can I walk in?

Walk-ins are welcome at all PULSE Clinic locations. However, booking an appointment in advance is recommended to reduce waiting times and ensure you have a dedicated consultation time with one of our healthcare professionals. Appointments can be made online.

Final Word

Travelling or living in Thailand does not mean you have to take risks with your sexual health. The tools to stay safe are available, and the clinical support to diagnose and treat sexually transmitted infections is right here when you need it.

Whether you are visiting Thailand or living here long-term, regular testing is one of the most responsible things you can do for yourself and your partners.

If you are a local resident, we are here to help — not to judge. Our team provides confidential, professional, and compassionate sexual health care in a safe and welcoming environment.

Book Assessment and Treatment with us

Contact us at info.bkk@pulse-clinic.com or chat on your preferred platform: