Herpes (HSV) testing and management
Testing for the herpes simplex virus when you have a sore, and looking after symptoms of genital herpes, a common and very manageable infection that cannot be cured but can be well controlled.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- Genital herpes is common and very manageable; many people who carry the virus have no symptoms and never know.
- Diagnosis is best made by swabbing a sore while it is present; there is no reliable routine blood test to screen people without symptoms.
- There is no cure, but antiviral tablets ease symptoms, speed healing and can reduce how often outbreaks happen.
- Free, confidential testing, treatment and advice are available on the NHS, so you do not have to pay or feel judged.
A plain-English summary. The detail — including risks and recovery — is below.
At a glance
A general guide. Your specialist will give you advice for your situation.
Confirms the diagnosis when you have a sore, so you know what you are dealing with
A swab is not useful once a sore has fully healed, so testing between outbreaks rarely confirms the diagnosis.
Taking a swab from a sore takes only a moment and is mildly uncomfortable. You can carry on with your day.
Clear, non-judgemental explanation of what herpes is and how it behaves.
Taking a swab from a sore takes only a moment and is mildly uncomfortable. You can carry on with your day.
With antiviral tablets, pain relief and salt-water bathing, sores usually crust and heal over one to two weeks...
A swab result usually comes back within a few days to two weeks, confirming the diagnosis and the virus type.
Later outbreaks are usually shorter and milder. Many people learn the early tingling that warns of one, and can...
What is herpes (HSV) testing and management?
Genital herpes is caused by the herpes simplex virus (HSV). The same virus family causes cold sores around the mouth. There are two types, HSV-1 and HSV-2, and both can affect the mouth or the genitals. It is passed on through skin-to-skin contact, including vaginal, anal and oral sex.
Herpes is very common, and many people who carry the virus never know, because they have no symptoms or only mild ones. When symptoms do appear, they often include small blisters that burst to leave tender sores. The best way to diagnose genital herpes is to take a swab from a sore while it is present.
There is no cure that removes the virus from the body, but herpes is very manageable. Antiviral tablets help sores heal faster, ease symptoms, and can reduce how often outbreaks happen. Most people have fewer, milder outbreaks over time, and lead full, normal sex lives and relationships.
It is worth being clear about what the test can and cannot do. A swab works only when you have a sore. There is no reliable routine blood test to screen people without symptoms, and a blood test is not part of a standard sexual health check. NHS sexual health (genitourinary medicine, or GUM) clinics offer testing and treatment free and confidentially.
Types, options & approaches
There may be different ways to do this. The right approach depends on the clinical question and your circumstances.
Swab vs blood test for herpes
| Point | Swab from sore | Blood test |
|---|---|---|
| When useful | During an outbreak | Rarely, specific cases |
| Shows the site | Yes | No |
| Confirms the type | Yes | Sometimes |
| Routine screening | Not for symptomless | Not recommended |
A swab from a sore is the reliable test. Blood antibody tests are not used for routine screening because a positive result is common, does not show where the virus is, and can cause needless worry.
Preparing for your treatment
- If you have a sore, try to be seen while it is still present, as a swab works best on a fresh blister or ulcer.
- Note when symptoms started, as antivirals work best when started early in an outbreak.
- Tell the clinic if this is your first outbreak, as a first episode is treated and discussed differently.
- Tell the clinic if you are pregnant or might be, as herpes in pregnancy needs specific advice.
- Mention how often you get outbreaks, as this affects whether daily preventive treatment might help.
- Bring a list of any medicines and allergies.
- You do not need ID or proof of address, and the service is confidential.
What happens
At a clinic, a clinician will ask about your symptoms in confidence and, with your permission, look at the affected area. If you have a sore, they take a swab from it; this is quick and only mildly uncomfortable. The swab goes to a laboratory to confirm herpes and the virus type.
If this is your first outbreak, you may be started on antiviral tablets straight away rather than waiting for the result, and given advice on easing symptoms. The clinician will explain what herpes is, how it behaves, and how to lower the chance of passing it on.
For recurrences, you and the clinician decide together whether to treat each outbreak as it happens, or to take daily tablets for a while to prevent them. There is no examination needed when you have no symptoms, and there is no routine blood screen.
Is this treatment right for me?
A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.
May not be suitable if…
- A swab is not useful once a sore has fully healed, so testing between outbreaks rarely confirms the diagnosis.
- A blood antibody test is generally the wrong test for diagnosis and is not used for routine screening.
- Self-management alone is not enough for a severe first outbreak, especially if you cannot pass urine.
- Routine herpes testing is not part of a standard symptomless sexual health check.
Delay or rearrange if…
- You are unable to pass urine or are very unwell with a first outbreak; seek prompt care instead of waiting.
- You have a sore near the eye or eye symptoms, which need urgent assessment.
- You are pregnant and unsure of the advice; speak to your maternity team promptly.
- You have a weakened immune system and a severe outbreak, which may need specialist input.
Alternatives to discuss
- Watchful management of mild, infrequent outbreaks with simple comfort measures.
- Episodic antiviral treatment instead of daily treatment if outbreaks are occasional.
- Daily suppressive treatment if outbreaks are frequent or distressing.
- Counselling or support if the diagnosis is causing significant distress.
Before you decide
Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.
What matters most to me?
Think about symptoms, daily life, work, caring responsibilities, sport, fertility, travel, appearance and anxiety — the right choice depends on your priorities, not just the medical facts.
What are all my options?
Ask about waiting, monitoring, medicines, rehabilitation, a smaller or larger procedure, a different test, NHS referral, or a second opinion where that would help.
What would make me pause?
Active infection, pregnancy, unstable medical problems, smoking, medicines that increase bleeding, poor support at home, or feeling pressured are all reasons to slow down and get tailored advice.
What happens if I do nothing today?
For some problems, waiting is safe; for others, delay can make treatment harder. A good consultation should explain the trade-off in plain English.
Benefits
- Confirms the diagnosis when you have a sore, so you know what you are dealing with
- Antiviral tablets ease symptoms and help sores heal more quickly
- Daily treatment can greatly reduce frequent outbreaks
- Treatment can lower (though not remove) the chance of passing the virus on
- Clear, non-judgemental advice helps you feel in control and reduces worry
- Free and confidential on the NHS, with support for telling partners
Risks & complications
- A first outbreak can be painful, with tender sores, for several days to a couple of weeks
- Mild discomfort when a sore is swabbed
- Stinging when passing urine if sores are near the urethra
- Upset, embarrassment or worry about the diagnosis and telling partners
- Difficulty passing urine during a severe first outbreak, which needs prompt advice
- Side effects from antiviral tablets, such as headache or feeling sick
- A swab that does not detect the virus if the sore has already healed, needing a repeat if symptoms return
- Spread of the virus to other areas, such as the eyes, if sores are touched and hygiene is poor
- Serious illness in a newborn (neonatal herpes) if a first infection happens late in pregnancy, which is why pregnancy advice matters
Herpes itself is rarely dangerous in healthy adults, and much of the harm is emotional rather than physical. The situations that need particular care are a severe first outbreak (especially if you cannot pass urine), herpes in pregnancy, and herpes in people with a weakened immune system. The virus can sometimes be passed on even when there are no sores, so honesty with partners and, where helpful, daily treatment are part of management.
Published figures to discuss
Outbreak frequency, severity and the chance of passing the virus on vary a great deal between people and over time, so single figures can be misleading. Many people have few or no symptoms, while others have frequent outbreaks; most find outbreaks lessen over the years. The risk of passing herpes on is highest during an outbreak but is not zero between outbreaks. Because of this variation, management is tailored to the individual rather than driven by fixed percentages.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| Swab false negative if lesion is healing | Timing-dependent | A fresh blister or ulcer is much more likely to give a useful result than a dry or almost healed lesion. | Guide sourcesClinical context |
| Blood test gives confusing information | Common counselling issue | Type-specific blood tests can show past exposure but often cannot say where the infection is or when it was acquired. | NHS — Genital herpesnhs.ukSource-linked context |
| Transmission despite no visible sores | Recognised | Asymptomatic shedding means herpes can occasionally be passed on even when there is no outbreak. | Guide sourcesClinical context |
| Pregnancy or newborn risk | Higher with new infection late in pregnancy | Pregnancy, especially a first episode near delivery, needs urgent obstetric and sexual-health advice. | NHS — Genital herpesnhs.ukSource-linked context |
These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.
What happens afterwards
There is no physical recovery from the swab. A first outbreak usually settles over one to two weeks with treatment, and later outbreaks are usually shorter and milder. Managing herpes is about easing outbreaks when they happen and reducing how often they come.
- Tender sores that crust and heal over one to two weeks in a first outbreak
- Milder, shorter outbreaks over time
- A warning tingle or itch before some outbreaks
- Feeling upset or anxious at first, which usually eases with information and support
- No symptoms at all for long stretches between outbreaks
Aftercare
- Take antiviral tablets as directed, starting as early in an outbreak as possible.
- Keep sores clean and dry; bathing in warm salt water can soothe them.
- Use simple pain relief, and try passing urine in a warm bath or shower if it stings.
- Avoid touching sores, and wash your hands if you do, to avoid spreading the virus to the eyes.
- Avoid sex while you have sores or warning symptoms, and remember the virus can sometimes pass on without sores.
- Talk to partners; the clinic can help you decide what to say and how.
- If outbreaks are frequent or distressing, ask about daily preventive treatment.
- If you are pregnant, tell your maternity team, as this changes the advice.
- Antiviral tablets collected and started early
- Simple pain relief at home
- Loose, comfortable clothing while sores heal
- A plan to avoid sex during outbreaks and warning symptoms
- Knowing the early warning signs of your own outbreaks
- The clinic's contact number saved for advice
- A note to tell your maternity team if you are pregnant
⚠ Get urgent help if…
- Being unable to pass urine during a severe outbreak
- A very severe first outbreak with high fever or feeling very unwell
- A sore near or in the eye, or eye pain and redness
- Sores that are spreading, not healing, or look infected
- A new outbreak late in pregnancy or near your due date
- A weakened immune system with a severe or persistent outbreak
Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.
General guidance — it doesn't replace the specific advice your specialist gives you.
Results & realistic expectations
A positive swab confirms that a sore is due to herpes and usually shows whether it is HSV-1 or HSV-2. A negative swab does not always rule herpes out, because the virus can be missed if the sore has started to heal, so a repeat swab may be advised if symptoms return.
Knowing you have herpes does not change who you are or mean you cannot have relationships. It means you can manage outbreaks, reduce the chance of passing it on, and make informed choices. A blood test is generally not helpful for diagnosis and is not part of routine screening.
Herpes stays in the body for life, resting quietly in the nerves between outbreaks. This is not a sign that treatment has failed; it is simply how the virus behaves. Most people find outbreaks become less frequent over the years. Antiviral treatment does not remove the virus but controls symptoms and can be used short-term for outbreaks or daily for a period to prevent them.
Related tests, treatments or support
Herpes testing is part of sexual health care alongside tests for other infections such as chlamydia, gonorrhoea, HIV and syphilis, although herpes is only swabbed when you have a sore rather than screened for routinely. If you are diagnosed with herpes, the clinic will offer testing for other infections too, as they share similar risks.
Follow-up & long-term care
Most people do not need routine follow-up after a first outbreak, but the clinic is there if you have questions, frequent outbreaks, or are pregnant. If you start daily preventive treatment, it is usually reviewed after several months to see whether it is still needed. Come back if outbreaks change, become more frequent, or are hard to cope with.
- Episodic antiviral treatment for occasional outbreaks, started early.
- Daily suppressive treatment for a period if outbreaks are frequent, then reviewed.
- General health measures, as being run down, stressed or unwell can trigger outbreaks.
- Honest conversations with partners and, in pregnancy, with your maternity team.
Repeat, follow-on and what comes next
- A repeat swab may be needed if a first swab misses the virus and symptoms return.
- Treatment is reviewed and adjusted: episodic treatment may be switched to daily treatment if outbreaks are frequent.
- Daily suppressive treatment is usually reviewed after several months to see whether it is still needed.
Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.
What good aftercare looks like
- Clear, non-judgemental explanation of what herpes is and how it behaves.
- A treatment plan suited to how often you get outbreaks, with review of daily treatment.
- Practical advice on reducing transmission and on telling partners.
- Specific advice and a named contact for pregnancy or severe outbreaks.
What affects the cost
Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:
- Whether you use the free NHS service or pay privately
- Whether a swab and virus typing are included
- Whether antiviral treatment is included if needed
- Whether you choose episodic or daily preventive treatment
- Whether follow-up or review of preventive treatment is included
- Whether you also test for other infections at the same time
- The cost of seeing a clinician and having a swab if you have a sore
- Whether antiviral treatment is included
- How and when you will get your swab result
- Whether follow-up advice and review of preventive treatment are included
- Whether support for telling partners is offered
- What is, and is not, covered if a blood test is suggested
On the NHS? Herpes testing (by swabbing a sore) and treatment are free and confidential on the NHS at sexual health (GUM) clinics; private testing is an option but offers no advantage, and there is no reliable routine test for people without symptoms.
You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.
Consent traps and marketing red flags
These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.
Consent traps
- Being offered a blood test as a herpes screen without explaining its limitations and the worry it can cause.
- Not being told that the virus can sometimes pass on without sores.
- Stigmatising language that increases distress rather than supporting management.
- No clear plan for pregnancy, where the advice is different and important.
Marketing red flags
- Claims of a cure or of clearing the virus from the body.
- Selling a blood test as a reliable herpes screen for people without symptoms.
- Promising a treatment will stop all transmission.
- Charging for testing without explaining the free, confidential NHS service.
Choosing a specialist safely
- Check the specialist is on the GMC Specialist Register for this area.
- Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
- You're entitled to time to consider and to have your questions answered before you agree — the specialist who looks after you should explain it, not a salesperson.
- Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
- You're entitled to your total cost in writing — including any follow-up — before you decide.
Questions to ask your medical professional
Take this to your consultation. A good specialist will welcome every one of these.
- Is this my first outbreak, and should I start antiviral tablets now?
- Which type of herpes do I have, and what does that mean for me?
- How can I reduce the chance of passing it on to a partner?
- Would daily preventive treatment help if I get frequent outbreaks?
- What should I do differently if I become pregnant?
- What can I do to ease symptoms during an outbreak?
- Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
- Will you be the specialist who carries out my treatment, and who looks after me afterwards?
- What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
- What does a realistic result look like — and what can this treatment not achieve?
- What are my options, including waiting, doing nothing for now, or choosing a different approach?
- Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
- What is the total cost in writing, including any follow-ups, and how much time do I have to decide?
Frequently asked questions
Can herpes be cured?
Can I be tested for herpes if I have no symptoms?
Does having herpes mean I cannot have a normal sex life?
Can I pass it on when I have no sores?
Is it the same virus as cold sores?
I am pregnant and have herpes. Should I worry?
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How we made this page
Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →
Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.
Sources & standards: NHS — Genital herpes NHS — Aciclovir Terrence Higgins Trust — Herpes NHS Specialist Pharmacy Service — oral aciclovir for genital HSV
Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.
Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.
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