Clinically reviewed by Dr. Ponlawat Pitsuwan, Physician, Takecare Clinic Phuket. Last reviewed: September 2026.
“The people who walk into our Patong branch for a sexual health check are usually not unwell at all. They are anxious, often a day or two after a night out, a new partner or a condom that split, and they want to know two things: am I infected, and when can I be sure. Most of the time the honest answer involves timing, because every test has a window period. Getting the timing right is what turns a test into reassurance you can trust.” Dr. Ponlawat Pitsuwan
Who STD testing is for
A sexually transmitted infection (STI, the term doctors now prefer to STD) is any infection passed on through vaginal, anal or oral sex or close genital contact. Testing makes sense after any new partner, after sex without a condom or when a condom broke, if a partner tells you they have an infection, or simply before starting a new relationship. It also makes sense if you have symptoms such as discharge, burning when you pass urine, sores, a rash or pelvic pain.
Many sexually transmitted infections cause no symptoms at all, especially chlamydia, gonorrhoea (gonorrhea) in the throat or rectum, early syphilis and HIV. Feeling fine is not the same as being clear, which is why guidelines recommend routine screening for anyone with new or multiple partners, even without symptoms. Men who have sex with men are usually advised to test every 3 to 6 months.
What happens at your STD test, step by step
You walk in or message us first on WhatsApp so we can expect you. A doctor sees you in a private room and asks a few direct questions: when the possible exposure happened, what type of sex it was (vaginal, anal or oral), whether a condom was used, and whether you have symptoms. These questions are not about judgement. They decide which sites need sampling and which tests will give a reliable answer today.
The samples are simple. A first-catch urine sample (the first part of the stream) is used for chlamydia and gonorrhoea in men, and a self-taken vaginal swab is as accurate as a clinician swab for women. Throat and rectal swabs are added if you had oral or anal sex, because a urine test does not detect infection at those sites. A small blood sample covers HIV, syphilis and hepatitis B and C. If you have a sore or blister, the doctor may swab it for herpes.
Rapid tests, such as a fourth-generation HIV test, give an answer during the visit, and rapid test results are explained by the doctor rather than handed over on paper. Our on-site laboratory gives same-day results for many common tests, and the doctor tells you before you leave which results you will have today and which take longer. If a result is positive, we explain it face to face and start treatment from our on-site pharmacy where appropriate.
Window periods and what each test detects
The window period is the time between infection and the point where a test can reliably detect it. Testing too early can give a false negative, so the table below is the most useful thing on this page. It follows current international guidance.
| Infection | Test and sample | What it detects | Reliable from |
|---|---|---|---|
| Chlamydia | NAAT on urine or swab (vaginal, throat, rectal) | Genetic material of the bacterium | About 2 weeks |
| Gonorrhoea | NAAT on urine or swab; culture if treatment fails | Genetic material of the bacterium | About 2 weeks |
| HIV | Fourth-generation antigen/antibody blood test | p24 antigen and HIV antibodies | About 6 weeks (45 days) |
| Syphilis | Blood test for treponemal antibodies | Antibodies to Treponema pallidum | 3 to 6 weeks, repeat at 12 weeks |
| Hepatitis B | Hepatitis B surface antigen (HBsAg) blood test | A protein from the virus itself | 3 to 6 weeks, up to 12 weeks |
| Hepatitis C | Antibody blood test | Antibodies to the virus | 8 to 12 weeks |
| Herpes (HSV-1, HSV-2) | PCR swab of a fresh sore | Viral DNA in the sore | Only while a sore is present |
| Trichomoniasis | NAAT or microscopy on a vaginal swab or urine | The Trichomonas parasite | About 1 to 4 weeks |
NAAT stands for nucleic acid amplification test, a highly sensitive method that multiplies tiny amounts of an organism’s genetic material until it can be detected. For HIV, a fourth-generation test often turns positive earlier than 6 weeks, but a negative result is only fully reliable after that point. If you test earlier, for example on day 10 for peace of mind, we book a repeat test at the right interval rather than leaving you to count the days. Our HIV test in Phuket page explains rapid tests and confirmatory testing in more detail.
Confidentiality and what is included
Your consultation, samples and results are private medical records. They are not shared with your employer, hotel, travel companions or anyone else without your consent. If you want to claim on travel insurance, you choose what goes on the medical report. Results are given to you in person or through the contact method you choose.
A typical screen includes a doctor consultation, the tests that match your exposure, an explanation of results, treatment when an infection is found, and advice on telling partners. Common infections are treated the same day, for example chlamydia treatment with a week of antibiotics, and we cover blisters and sores on our genital herpes treatment page. For women, unusual discharge is often not an STI at all, and our guide to bacterial vaginosis (BV) treatment explains the difference. Burning without discharge is sometimes a bladder infection, so we may check for that too; see UTI treatment in Phuket.
When to see a doctor
Come in the same day if you have discharge from the penis or vagina, burning when passing urine, pain in the testicles, pelvic pain or pain during sex, a sore or ulcer on the genitals or mouth, or a new rash on the body, palms or soles. A rash with fever, sore throat and swollen glands 2 to 4 weeks after an exposure can be early HIV infection and needs testing.
If the exposure happened within the last 72 hours, the priority is not testing but HIV prevention. Go to any branch immediately and ask about PEP treatment in Phuket, which works best when started within 2 hours. Go to a hospital emergency department, or call 1669, if you have severe lower abdominal pain with fever, fainting, or heavy bleeding in pregnancy.
Prevention and early detection
Condoms used from start to finish greatly reduce the risk of HIV, chlamydia and gonorrhoea, and reduce but do not eliminate herpes, syphilis and HPV, which spread through skin contact. Alcohol is the most common reason condoms are skipped in Phuket’s nightlife areas, so decide in advance and carry your own. Vaccination protects against hepatitis B and HPV, and people at ongoing HIV risk can take daily tablets through our PrEP clinic in Phuket.
Early detection means routine testing rather than waiting for symptoms: after every new partner, and every 3 to 6 months if you have several partners. Cold sores on the lips are also caused by a herpes virus and can pass to a partner’s genitals through oral sex, so avoid oral sex during an outbreak; our cold sore treatment page covers this.
Visiting Takecare Clinic in Phuket
All three branches are open 24 hours a day, 7 days a week, and walk-ins are welcome. You can come to Takecare Clinic Bangtao (Cherngtalay) on Bandon Road, Takecare Clinic Kata-Karon on Kedkwan Road, or Takecare Clinic Patong on Prachanukroh Road. Most walk-in visits take under 30 minutes, and you are usually seen within minutes.
If you prefer to arrange things discreetly first, book on WhatsApp or call 081-718-9080. We confirm the price on WhatsApp before your visit. A doctor can come to your hotel or villa if you would rather test in private. We offer direct billing with most travel insurers and provide receipts and medical reports for claims, although some policies exclude routine sexual health screening, so check yours.
Related services and treatments
If you also want general health checks, such as liver or kidney function or a full blood count, these can be done from the same sample; see our blood tests in Phuket. For anything else that comes up on your trip, from a fever to a wound, a walk-in doctor in Phuket is available at every branch around the clock.
Summary
STD testing in Phuket is quick, private and available at any hour at Takecare Clinic. The doctor chooses tests based on what kind of sex you had and when, samples the right sites, and explains the window period for each result so you know when a negative is final. Infections found are treated the same day where possible. If the exposure was in the last 72 hours, come in immediately for a PEP assessment first.
“Tell us honestly what happened and when. We have heard it all before, and the details are what let us choose a test that gives you a true answer instead of a false reassurance.” Dr. Ponlawat Pitsuwan
Frequently asked questions
How soon after sex can I get an STD test?
You can test at any time, but results are only reliable after each window period: about 2 weeks for chlamydia and gonorrhoea, about 6 weeks for a fourth-generation HIV test, and 3 to 6 weeks for syphilis, repeated at 12 weeks. If you test earlier, we plan the repeat. If the exposure was within 72 hours, ask about HIV PEP before anything else.
Is STD testing at Takecare confidential?
Yes. You are seen privately by a doctor, and your results are part of your confidential medical record. We do not share them with anyone without your consent, including travel companions, hotels or employers. If you claim on insurance, you decide what the medical report includes, and results are given in person or by the contact method you choose.
Do I need an appointment for STD testing in Phuket?
No. All three branches in Bangtao, Kata and Patong accept walk-ins 24 hours a day, and you are usually seen within minutes. Many people prefer to message us on WhatsApp first so we can confirm the price and expect them. You can also ask for a doctor to visit your hotel or villa if you would rather test privately.
How much does an STD test cost, and will insurance pay?
The price depends on which tests you need, which depends on your exposure, so we confirm the price on WhatsApp before your visit. Many travel insurance policies cover tests when you have symptoms, but some exclude routine screening without symptoms. We provide an itemised receipt and medical report, and direct billing with most travel insurers where the policy allows it.
Can I have an STI without any symptoms?
Yes, and it is very common. Most chlamydia infections, many gonorrhoea infections in the throat or rectum, early syphilis and early HIV cause no symptoms at all. Untreated, some of these can cause infertility, pelvic inflammatory disease or long-term illness, and can be passed on. That is why routine screening after a new partner is recommended even when you feel well.
Will a urine test pick up every STI?
No. A urine test detects chlamydia and gonorrhoea in the urethra, but not infections in the throat or rectum, which need swabs. HIV, syphilis and hepatitis need a blood test, and herpes is tested by swabbing an active sore. That is why the doctor asks what kind of sex you had, so the right samples are taken the first time.
Sources
NHS: Sexually transmitted infections (STIs). CDC: Sexually Transmitted Infections Treatment Guidelines. WHO: Sexually transmitted infections fact sheet.
STD testing, STI screening, sexually transmitted infections, sexual health clinic, chlamydia, gonorrhoea, syphilis, HIV, hepatitis B, hepatitis C, herpes simplex virus, trichomoniasis, NAAT, fourth-generation HIV antigen/antibody test, p24 antigen, HBsAg, window period, PEP, PrEP, CDC, WHO, NHS, Bangtao, Cherngtalay, Kata, Karon, Patong, Phuket, Dr. Ponlawat Pitsuwan, Takecare Clinic Phuket.
This page is general health information and not a substitute for a medical consultation.