Private STI Testing in London: What Is Tested and How It Works
STI testing should match your symptoms, the type of sex you had, the time since exposure and the infection being considered. A test taken too early can be falsely reassuring, and some situations need urgent sexual-health advice rather than routine testing.
In brief: Sexual-health clinics test and treat many STIs, and the NHS describes STI care as confidential and straightforward.[1] Your test may involve urine, blood or swabs, chosen according to your symptoms and exposure. Victoria Medical confirms suitability, availability, sample route, reporting and follow-up arrangements at booking. Seek urgent advice if you may need HIV PEP, have severe pain, feel acutely unwell, are pregnant with symptoms or need help after sexual assault.
When should you seek urgent sexual-health advice?
Do not wait for a routine private test if HIV exposure may have occurred in the last 72 hours, if you have severe pelvic or testicular pain, significant genital ulcers, fever, a rash with illness, pregnancy with genital symptoms, or if you need support after rape or sexual assault. Use NHS 111, a sexual-health clinic, an emergency department or specialist sexual-assault support according to urgency and local availability.
UKHSA advises people not to wait for a postal test after a possible HIV exposure in the previous three days, because assessment for post-exposure prophylaxis may be needed.[2] A private testing appointment should not delay emergency or specialist sexual-health care.
Symptoms, timing and test selection
STIs can cause discharge, pain when passing urine, genital sores, lumps, rashes, pelvic pain, rectal pain, testicular pain or no symptoms at all.[2] Symptoms make in-person assessment more important, because the clinician may need to examine the affected area or test the specific body site involved.
A “full screen” can sound reassuring, but the safer question is whether the test set matches your exposure. Oral, vaginal, anal and genital skin contact can need different samples. A negative result soon after exposure may need repeat testing if the infection was still within its window period.
Which route fits your situation?
| Situation | Safer route | Samples that may be used |
|---|---|---|
| No symptoms after a recent exposure | A clinician or sexual-health service can advise which samples are useful and whether testing needs to be repeated if the first test is too early. | Urine, self-taken swabs, throat or rectal swabs, and blood tests may be used depending on the type of sex and infection considered. |
| Symptoms such as discharge, pain passing urine, ulcers, rash or pelvic, rectal or testicular pain | In-person assessment is safer than a routine postal-style screen, because examination and targeted swabs may be needed. | The clinician may use swabs from symptoms, urine tests, blood tests and a genital examination. |
| Possible HIV exposure in the last 72 hours | Do not wait for a routine private test. Seek urgent sexual-health or emergency advice because HIV post-exposure prophylaxis assessment is time-sensitive. | Testing may be part of urgent assessment, but immediate risk assessment comes first. |
| Positive result or a partner tells you they have an STI | Ask how treatment, partner notification, repeat testing and safer-sex advice will be arranged through the correct clinical route. | Further tests may be advised depending on the infection, symptoms and timing. |
What happens at an STI testing appointment?
The NHS says a doctor or nurse may ask about your medical and sexual history, when you last had sex, whether you used condoms and whether you have symptoms.[1] The questions guide the test choice, not a judgement about you.
The clinic asks what happened, when it happened, whether you have symptoms and which types of sex may have exposed different body sites.
You can ask about privacy, chaperones, sample types, contact methods for results and whether any information would be shared with another service.
Testing may involve urine, blood or swabs. Some vaginal swabs can be self-taken; throat, rectal, urethral or lesion swabs depend on the situation.
Results and follow-up times vary by test and laboratory pathway. Victoria Medical confirms reporting and follow-up arrangements at booking.
If a result is positive, the next step may include treatment advice, avoiding sex for a period, partner notification or referral to a specialist sexual-health service.
Confidentiality, results and partner notification
NHS sexual-health clinics keep visits confidential and do not tell your GP without permission, except where safeguarding or legal duties require it.[1] Ask any private clinic how it records results, whether it can send a copy to your GP if you choose, and how it manages positive results.
If you test positive, NHS guidance says you may need to return to discuss treatment and partner notification.[1] Partner notification helps recent partners test and receive treatment without the clinic naming you, where that service is available.
Evidence-only information
This guide summarises NHS, UKHSA, NHS inform and NICE public-health information for patient education. It does not claim a named clinician review, make a diagnosis, replace a sexual-health consultation or state that one private test pathway fits every exposure.
Frequently asked questions
How soon after sex should I test for an STI?
The right timing depends on the infection and exposure. Testing too soon can miss an infection, so a clinician or sexual-health service may advise repeat testing. Seek urgent advice within 72 hours if HIV exposure may have occurred because PEP assessment may be time-sensitive.
Can I have an STI and no symptoms?
Yes. UKHSA states that many STIs can cause no symptoms, or symptoms may take time to appear. Testing is the way to know whether an infection is present.
Which STIs does a private screen test for?
There is no single screen that suits every situation. The test set should reflect your symptoms, sexual history, body sites exposed, previous results, vaccination history and timing since exposure.
Is private STI testing confidential?
The NHS describes sexual-health testing as confidential. A private clinic should also explain how your details and results are handled, including any legal, safeguarding or public-health situations where sharing may be required.
What should I do if my result is positive?
Follow the clinical advice that comes with the result. You may need treatment, partner notification, repeat testing or specialist sexual-health care. Avoid sex or use safer-sex precautions until a clinician advises what is safe for your situation.
References
- [1]NHS. Visiting a sexual health clinic. Page last reviewed 22 February 2023. Accessed 30 August 2026. https://www.nhs.uk/live-well/sexual-health/visiting-an-sti-clinic/
- [2]UK Health Security Agency. Getting tested for an STI: your guide to how it works. Published 5 October 2022. Accessed 30 August 2026. https://ukhsa.blog.gov.uk/2022/10/05/getting-tested-for-an-sti-your-guide-to-how-it-works/
- [3]NHS inform. Visiting a sexual health service. Last updated 18 October 2024. Accessed 30 August 2026. https://www.nhsinform.scot/care-support-and-rights/nhs-services/sexual-health/visiting-a-sexual-health-service/
- [4]NICE. Sexually transmitted infections: condom use. Public health guideline PH3. Accessed 30 August 2026. https://www.nice.org.uk/guidance/ph3
Ask about private STI testing
The clinic confirms suitability, sample type, appointment availability, confidentiality handling, reporting and follow-up before booking.
020 3146 9508Questions to ask before booking
Ask which infections are included, whether your exposure timing affects accuracy, how results are delivered, who explains positive results and what route applies if treatment or partner notification is needed.