Wellness · Sexual health
STI prevention and testing, modern, unstigmatised, effective.
Testing is quick and confidential. PrEP prevents HIV. HPV vaccination prevents most cervical and anal cancers. Here is the modern playbook.
Why trust this guide
- 01
Clinically reviewed
Written by our editorial team and reviewed by a registered UK clinician before publication.
- 02
Sourced from BASHH and NICE
Guidance drawn from BASHH, NICE CKS, NHS sexual health services and UK HSA vaccination advice.
- 03
Non-judgmental
Plain, respectful information — testing is a health basic, not a moral judgement.
Key facts
STI prevention at a glance.
The essentials, in plain English — how often to test, what prevents HIV, and what the HPV vaccine actually does.
-
Routine, not judgement
Regular testing is a health basic, not a moral judgement — it belongs in ordinary self-care.
-
How often
Test annually if sexually active, and every 3–6 months on PrEP or with new partners.
-
HPV vaccine
HPV vaccination catches most oncogenic strains — the drivers of cervical and anal cancers.
-
PrEP prevents HIV
PrEP is highly effective HIV prevention and is available on the NHS for eligible people.
-
Condoms and their limits
Condoms prevent most STIs — herpes and HPV are the notable exceptions.
-
Partner notification
If you test positive, notifying partners matters — services like SH24 and Umbrella help you do it anonymously.
Why this guide matters
Small habits, real prevention.
STI care is quietly modern — PrEP, vaccines and rapid tests have changed the picture. The three points below shape everything else on this page.
-
Testing is health admin
A regular test belongs alongside the smear and the dentist — no drama attached.
-
PrEP and vaccines prevent most
HIV PrEP, HPV and hepatitis B vaccines do more than any single behavioural change.
-
Access is easy — use it
NHS clinics, home postal kits and private services all work. Pick the one you will actually use.
The evidence
A sensible order to stay on top of it.
A pragmatic sequence — test regularly, vaccinate where useful, and prevent what can be prevented.
Phase 1 · Test
Book regular asymptomatic testing and act quickly on symptoms
Phase 2 · Choose
Home kits or accredited clinics, plus HPV and hepatitis B
Phase 3 · Prevent
PrEP if eligible, and partner notification if positive
- 01
Test
Book asymptomatic testing regularly
A baseline habit — annually, or every 3–6 months if on PrEP or with new partners.
- 02
Test
Symptomatic — book immediate testing
New discharge, sores, pain or a rash deserves same-week assessment, not a wait-and-see.
- 03
Test
Home testing kits from sexual-health clinics
Discreet postal kits (SH24, Sexual Health London, Umbrella) cover the main infections.
- 04
Choose
Use accredited clinics — NHS or private
Look for BASHH-aligned services; results should be clear, actionable and confidential.
- 05
Choose
Vaccinate against HPV and hepatitis B if eligible
HPV protects against most cervical and anal cancers; hepatitis B is a lifelong safeguard.
- 06
Prevent
Discuss PrEP if higher-risk
A short GP or sexual-health conversation — eligibility and monitoring are straightforward.
- 07
Prevent
Notify partners if positive
Anonymous services do the awkward part for you — early notification prevents onward spread.
Typical timeline: a few days from booking a test to results and, if needed, treatment.
Signs it affects you
Common scenarios, and one to escalate.
A quick self-check. Most of these are routine and testable — the final tile flags what needs same-day care.
-
Asymptomatic screening
Routine chlamydia, gonorrhoea, HIV and syphilis testing when you feel well.
-
Symptomatic infection
Discharge, sores, dysuria, pelvic or testicular pain — book prompt testing.
-
PrEP for HIV
Daily or event-based pre-exposure prophylaxis for people at higher HIV risk.
-
HPV vaccination
Prevents most cervical and anal cancers — offered to teenagers and eligible adults.
-
Hepatitis B vaccination
Three-dose course gives lifelong protection — recommended for many groups.
-
Pregnancy planning
A pre-conception STI screen is a simple, sensible step for both partners.
-
MSM screening
Three-monthly screening (throat, rectal, urine plus bloods) if on PrEP or higher-risk.
-
Red flag
Severe pelvic pain or signs of disseminated infection — go to A&E the same day.
How to do it
Services and tools that actually help.
Eight options, evidence-based and widely available across NHS and private services — often combined rather than used alone.
-
NHS sexual-health clinic
Free, confidential and comprehensive — testing, treatment, vaccination and PrEP under one roof.
-
Private STI clinic
Faster appointments and results; useful when NHS waits are long or you want extended panels.
-
Home postal kit
SH24, Sexual Health London and Umbrella send discreet self-collection kits with lab results.
-
Rapid HIV test
Finger-prick or oral swab with results in minutes — useful for reassurance or after a known exposure.
-
PrEP prescription
NHS-available for eligible people; specialist-led, with three-monthly monitoring.
-
HPV vaccine
Nonavalent HPV vaccine — offered through schools and eligible adult programmes.
-
Hepatitis B vaccine
Three doses over six months, with a booster check — long-term protection.
-
Partner notification (Umbrella / SH24)
Anonymous partner-notification services — they do the message so you do not have to.
What this guide is based on
The sources behind every claim on this page.
UK national guidance and specialist society standards, current at the time of last review.
Key references
Guidelines and standards we relied on.
A quiet reminder
This guide is for information, not medical advice.
If you have symptoms or a known exposure, please book with a sexual-health clinic or your GP — testing and treatment are quick, free and confidential.
-
British Association for Sexual Health and HIV (BASHH). National STI guidelines.
-
NHS. Sexual health services and STI testing.
-
NICE CKS. Sexually transmitted infections.
-
UK Health Security Agency. Immunisation against infectious disease (the Green Book).
Red flags
When to seek help urgently.
These signs suggest something that needs prompt medical or safeguarding attention. Please do not wait.
-
Severe pelvic pain with fever
May indicate pelvic inflammatory disease — same-day medical assessment.
-
Disseminated gonococcal or syphilis
Rash, joint pain or systemic illness — urgent specialist review.
-
HIV seroconversion illness
Fever, sore throat, rash and lymph nodes weeks after exposure — test promptly.
-
Pregnancy with untreated STI
Speak to a midwife or sexual-health clinic straight away — some infections affect the baby.
-
Sexual assault (specialist SARC pathway)
Sexual Assault Referral Centres offer care regardless of whether you report to police.
-
Post-exposure prophylaxis needed (72-hour window)
PEP for HIV must start within 72 hours — go to A&E or a sexual-health clinic today.
-
Recurrent infections
Repeated positive tests warrant a fuller review — partners, reinfection or resistant strains.
-
MSM without regular screening
Three-monthly screening prevents onward transmission and catches asymptomatic infection.
-
Immunosuppression
Cancer, HIV or transplant patients — coordinate STI care with the specialist team.
Making it stick
Prevention is routine, and workable.
Four principles to hold onto as you build STI prevention into ordinary life.
A quiet reminder
You do not have to solve this alone.
NHS sexual-health clinics, home postal kits and private services are all designed to make testing straightforward.
- 01 Routine
Testing is health admin, not judgement
Put it on the calendar with the dentist and the smear — that framing removes the drama.
- 02 Prevention
PrEP and vaccines do heavy lifting
HIV PrEP and HPV/hepatitis B vaccines are the highest-yield things to know about.
- 03 Partners
Notification is a kindness
Anonymous services make partner notification simple — and it is the right thing to do.
- 04 Access
Free NHS or fast private — both work
Choose whatever gets you tested. The best pathway is the one you actually use.
Frequently asked
Everything we get asked about STI prevention.
Quick answers on testing intervals, PrEP, HPV, condoms and PEP.
-
How often should I get tested for STIs?
Annually if sexually active, and every 3–6 months if you are on PrEP, have new partners, or are in a higher-risk group. Symptomatic testing should be immediate.
-
Is PrEP available on the NHS?
Yes. PrEP is available on the NHS for eligible people through sexual-health clinics, with three-monthly monitoring for renal function and STIs.
-
Does the HPV vaccine work for adults?
Yes. HPV vaccination protects against the strains that cause most cervical and anal cancers, and is offered to eligible adults as well as adolescents.
-
Do condoms prevent all STIs?
They prevent most, including HIV, chlamydia and gonorrhoea, but not everything — herpes and HPV can spread through skin contact outside the covered area.
-
What is PEP, and when do I need it?
Post-exposure prophylaxis is a 28-day course that can prevent HIV after a known or suspected exposure. It must be started within 72 hours — sooner is better. Go to A&E or a sexual-health clinic.
-
Are home STI kits reliable?
Yes, when they come from an accredited service (SH24, Sexual Health London, Umbrella). Results are lab-processed and treatment pathways are clear.
Related content
Keep reading.
-
STI screening
What each test looks for, and how the panels differ.
Learn more -
Cervical screening
HPV-first testing, intervals and what results actually mean.
Learn more -
Contraception
Options that fit your life — reversible, long-acting or permanent.
Learn more -
All wellness topics
Explore the rest of our wellness guides.
Learn more