When should you get tested for STIs?

News about sexually transmitted infections can leave you wondering whether you need a test, even if you feel well. The latest UKHSA quarterly surveillance report published on 16 September 2026 gives a mixed picture for England, rather than a rise in every infection. Provisional gonorrhoea and infectious syphilis diagnoses fell compared with the previous quarter, while annual figures show increases in some infections and groups.

For an individual patient, national trends are only part of the story. What matters is the contact you have had, when it happened, whether a partner has an infection and whether you have symptoms. Those details help establish whether you need advice today, a test after a suitable interval, or both.

When should you consider an STI test?

Testing is worth considering after sex without a condom with a new or casual partner, if a condom broke, or if a partner has received a positive result. It can also be a sensible step before stopping condom use in a new relationship. Many STIs cause no symptoms, so feeling well does not reliably exclude an infection.

You do not need to know which infection you might have before asking for help. A confidential conversation about the date and type of contact is often the most useful starting point. Oral and anal sex matter too, because an infection in the throat or rectum may not be detected by a urine or genital sample.

When to seek advice before waiting for a test

The first question is whether anything needs attention now. If a possible HIV exposure occurred within the past 72 hours, contact an NHS sexual health service or A&E urgently about post-exposure prophylaxis, known as PEP. Treatment works best when started as soon as possible. Do not delay that assessment while arranging a routine STI screen.

If pregnancy is possible, seek prompt advice from a pharmacist or sexual health service about emergency contraception. If a partner has tested positive, or you have symptoms, contact a clinician even if the usual testing window has not passed. You may need examination, testing now with a repeat later, or treatment based on the clinical findings.

Symptoms that need assessment

Unusual vaginal, penile or anal discharge, pain when passing urine, genital sores or blisters, pelvic pain, testicular discomfort, bleeding after sex or a new rash after sexual contact should be assessed. Symptoms can improve while an infection remains, so a sore that has healed is still worth mentioning.

Seek urgent advice from a GP or NHS 111 for pelvic pain with fever, unusual discharge, bleeding or possible pregnancy, or for suspected gonorrhoea with painful red eyes or swollen joints. Go to A&E for sudden severe testicular pain, severe or worsening pelvic pain, collapse or feeling acutely unwell.

If you have symptoms, arrange an in-person assessment so the clinician can examine you and collect the relevant samples.

How long should you wait before testing?

Once any immediate concerns have been addressed, timing becomes important. An infection may be present before a test can detect it. This interval is called the testing window, and it varies with both the infection and the test used.

Chlamydia testing and gonorrhoea tests are commonly taken from around two weeks after exposure for routine screening without symptoms. Testing earlier may be useful in some circumstances, but a negative result may need repeating.

HIV testing includes standard antigen and antibody tests and early-detection RNA tests. The test method and time since exposure determine how a negative result is interpreted; an early test may need a later confirmatory test. A quick laboratory result does not mean an infection can be excluded sooner after contact.

Syphilis antibodies can take time to become detectable, so repeat blood testing may be advised after a recent exposure. Hepatitis B testing takes account of vaccination history as well as exposure, because different markers can indicate infection or immunity. Hepatitis C testing can look for antibodies or viral RNA, which answer different questions about exposure and current infection.

If you have ongoing exposures, tell the clinician about the most recent one. A negative result relates to the infections tested for, the samples collected and the timing of those samples; it cannot exclude an infection acquired afterwards.

Which samples and tests do you need?

Timing is only one part of a useful test. The sample also needs to match the site of contact. Chlamydia and gonorrhoea testing usually uses urine or a swab, with throat and rectal samples considered after exposure at those sites. Blood samples are used for HIV, syphilis and hepatitis tests.

For a fresh genital blister or sore, a herpes swab may be more useful than adding an antibody test to a routine screen. A clinician can assess the lesion and decide which investigation would answer the question.

A larger panel is not automatically a better choice. A screen labelled comprehensive may still omit an exposed body site, while adding tests unrelated to your history can produce results that are difficult to interpret. Agreeing the infections, sample sites and timing before collection makes the result more useful.

Choosing where to get tested

Once you know what needs testing and when, you can choose where to have it done. NHS sexual health services, home-sampling schemes and private clinics offer different routes. The most useful comparison is whether a service can provide the assessment, samples and follow-up you need, rather than speed alone.

NHS sexual health clinics

NHS clinics provide free, confidential STI testing and treatment, usually without a GP referral. They can assess symptoms, advise on prevention and help with partner notification. The NHS guidance on sexually transmitted infections explains what to expect. Appointment availability and result times vary by service and test, so it is worth checking locally rather than assuming all NHS testing takes longer.

Home-sampling kits

Some NHS services offer home sampling for people without symptoms, and private kits are also available. Eligibility and the infections covered vary. Samples are collected at home and sent to a laboratory, so the total wait includes delivery and return postage as well as processing. Check that the kit covers the relevant infections and body sites, and that there is a clear route to advice and treatment if a result is positive.

If you have symptoms, a kit is not a substitute for an in-person assessment. Examination or additional swabs may be needed, and a negative result does not explain every cause of genital symptoms.

Private clinics

Private testing involves a fee and may offer a choice of appointment time and location, with support during sample collection. Some clinics have on-site laboratories for selected tests, which can shorten the wait after the sample is taken. Before booking, check what the price includes, the turnaround for your specific test and how positive results are managed.

Whichever route you choose, urgent concerns should not wait for a routine screen. If you choose private testing, the next question is whether you need straightforward sample collection or a doctor's assessment.

STI testing at DocTap

Our private STI testing includes individual tests and combined screens. The four-infection screen covers chlamydia, gonorrhoea, HIV and syphilis; the six-infection screen adds hepatitis B and C. Throat or rectal sampling and other tests may be needed according to exposure or symptoms.

The choice should follow your history rather than the number of infections in a package. For example, a genital sample alone would not address a concern about infection following oral sex.

The right appointment depends on whether you need straightforward sample collection or a clinical assessment.

Screening with a healthcare assistant

Our healthcare assistant-led screening appointments suit routine or precautionary screening when you have no symptoms and know which tests you need. The trained healthcare assistant collects or guides the samples. This route does not include a GP consultation.

Assessment and testing with a GP

GP-led STI appointments suit symptoms, recent exposure or uncertainty about which tests to choose. These include a 15-minute consultation, with testing guided by your history and assessment. Both individual tests and combined screens are available.

When to expect your results

Selected tests and screens have four-hour results at our London clinics with on-site laboratories. Most standard results elsewhere are available by 6pm the next working day. Early-detection and some broader panels take longer; check the specific test and location.

Results are available securely through your DocTap account, and positive results are reviewed by a GP.

Waiting for results can be worrying, but the speed of processing and the testing window are separate. A four-hour result still needs to be interpreted against the date of your last exposure.

Understanding your results and next steps

The next step depends on the infection and your symptoms. Some results need confirmatory testing. Treatment may involve a prescription or an appointment with a sexual health specialist, and HIV or hepatitis diagnoses need specialist follow-up. Gonorrhoea may require additional sampling to guide treatment and follow-up testing.

Current or recent partners may need testing or treatment too. Sexual health services can help notify partners confidentially without naming you. Follow the treating clinician's advice about when it is safe to resume sex and whether a repeat test is needed.

If a result is negative but symptoms continue, arrange a review. An early test, an untested body site or a different cause of symptoms may need to be considered. The aim is to leave with a clear plan, not simply a set of results.