Serious complications from genital herpes are uncommon. Most people get little more than periodic skin sores. The risks worth knowing are a severe first outbreak, passing the virus to a partner with no symptoms, neonatal herpes when an active infection is present at delivery, and rare spread beyond the skin. Daily antiviral medicine lowers most of these risks.
NAAT or culture
not a cure
USPSTF Grade D
| Item | Value |
|---|---|
| Most people | mild / none |
| Test | swab a sore — NAAT or culture |
| Antivirals | control — not a cure |
| Screening | not advised — USPSTF Grade D |
The essentials: what genital herpes actually does
Genital herpes is caused by two related viruses, herpes simplex virus type 1 (HSV-1) and type 2 (HSV-2) CDC. After the first infection, the virus retreats into nerve roots and stays there for life. There's no cure, and antivirals don't eradicate the latent virus or change how often or how badly outbreaks come back once you stop the drug. For the overwhelming majority of people it's a manageable skin condition.
Most people with genital herpes have no symptoms or very mild ones, and most don't know they're infected; the majority of HSV-2 infections are never diagnosed. The picture is also shifting toward the oral-type virus, HSV-1, as a cause of new genital infections. In one US young-adult cohort, the proportion of genital herpes caused by HSV-1 rose from 31% to 78% HSV-1 cohort. Genital HSV-1 recurs far less often, roughly once in the first year, versus about four times a year for HSV-2.
Symptoms and the complications worth watching for
A first outbreak is usually the worst one. Small blisters break open into painful sores that take a week or more to heal, often on or around the genitals, rectum, or mouth. Many people also get flu-like symptoms as the immune system meets the virus for the first time: fever, body aches, and swollen glands in the groin. Repeat outbreaks are shorter and milder, and some people feel a prodrome (tingling, itching, or nerve pain) a day or two before a sore appears.
The complications below are real but uncommon. Each one is a reason to know the warning signs:
- Severe or prolonged first outbreak: extensive painful sores can make urinating, sitting, or walking miserable, and occasionally cause urinary retention (being unable to pass urine because the sores and swelling are so painful).
- Transmission to a partner without symptoms: silent spread is the most common "complication." People with HSV-2 shed virus on about 10% of days even when they never have an outbreak, and most of that shedding leaves no visible sore JAMA. The virus moves between people who think they're in the clear.
- Neonatal herpes: a newborn can catch HSV during vaginal delivery if the mother has an active genital infection. It's rare, but it can be serious for the baby, which is why pregnancy is managed carefully (see below).
- Aseptic meningitis: inflammation of the lining around the brain, usually with the first outbreak, causing headache, stiff neck, and light sensitivity. It typically resolves on its own but warrants urgent evaluation.
- Disseminated or organ infection: in people with weakened immune systems, the virus can spread beyond the skin. This is unusual and needs hospital-level care.
- Emotional and relationship impact: for many people the hardest part is the diagnosis itself rather than the sores.
For a fuller picture of how the first and recurrent outbreaks present in women, including symptoms easy to mistake for a yeast infection or UTI, see our guide to genital herpes symptoms in women.
How genital herpes is tested
The right test depends on whether you have a sore right now. If you do, swab the lesion and send it for type-specific virologic testing: a NAAT (nucleic acid amplification test) or viral culture CDC testing. Swab-based tests work best on a fresh sore, so go in early rather than waiting for it to crust over and heal. The swab also tells you which virus it is, HSV-1 or HSV-2, which helps predict how often it's likely to recur.
Without any sore, a type-specific blood (serologic) test can help, but it has real limits. The CDC does not recommend HSV-2 blood screening for the general population or for people with no symptoms, because false positives are common and a wrong result can cause needless distress. Asking for a herpes blood test "just to check" with no symptoms often raises more questions than it answers. Timing matters too: antibodies take time to develop, so read up on the when to test after exposure windows before you decide. The full step-by-step is in our herpes testing guide, and you can get tested when you're ready.
How genital herpes is treated
Three FDA-approved antivirals — acyclovir, valacyclovir, and famciclovir — control symptoms but don't cure the infection CDC Tx. They're inexpensive generics, and a clinic visit during an outbreak both confirms the diagnosis and gets you a prescription. There are two ways to use them:
| Approach | How you take it | What it does |
|---|---|---|
| Episodic therapy | A short course started at the first sign of an outbreak (or during the prodrome) | Shortens and eases that outbreak; best for infrequent recurrences |
| Suppressive therapy | A pill every day, ongoing | Reduces recurrences by 70%–80% in frequent recurrers and lowers the chance of passing HSV-2 to a partner |
Daily suppressive therapy does more than cut your own outbreaks. In a randomized trial of couples where one partner had HSV-2 and the other didn't, daily valacyclovir lowered the risk of transmission by about 48% Corey et al.. It doesn't make transmission impossible, but it meaningfully lowers the odds, and some people take a daily pill for a partner's sake. Our full genital herpes treatment guide walks through dosing options and how to choose between episodic and suppressive use.
Herpes in pregnancy
Pregnancy gets its own plan because the goal is protecting the newborn. Antiviral medicine late in pregnancy can reduce active signs at delivery, and suppressive acyclovir started around 36 weeks lowers the chance of needing a cesarean. If a woman has recurrent lesions or symptoms of an outbreak at the onset of labor, a cesarean delivery is recommended to reduce the risk of neonatal HSV. Tell your prenatal provider if you or your partner has ever had genital herpes, even if you've never had a noticeable outbreak.
Preventing transmission
Because most herpes is passed by people who are unaware they're infected or have no symptoms at the moment, prevention is about lowering risk rather than guaranteeing zero risk. A few measures move the needle:
- Disclosure. Telling partners lets them make informed choices and decide on testing or precautions. It's awkward, but it's the single most respectful step.
- Daily suppressive antivirals. They make transmission to partners less likely and are worth discussing if you have a partner who doesn't carry the virus.
- Condoms. They decrease HSV-2 transmission but don't eliminate it, since the virus can live on skin a condom doesn't cover.
- Avoid contact during outbreaks and prodrome. Skin-to-skin contact when sores or warning tingling are present carries the highest risk.
- Don't rely on "no sore means no risk." Silent shedding spreads the virus unknowingly, and assuming otherwise is the most common mistake.
When to see a clinician
Most outbreaks can wait for a routine visit, but some signs deserve prompt or urgent care:
- A first-ever outbreak. Getting swabbed early gives the most reliable diagnosis and a head start on treatment.
- Being unable to urinate, or severe pain when you do, because of genital sores and swelling.
- A severe headache with a stiff neck, fever, confusion, or sensitivity to light, which can signal herpes meningitis.
- Sores that are spreading fast, very widespread, or not healing, especially if you have a weakened immune system, are on chemotherapy, or have HIV.
- Pregnancy with a history of genital herpes, so delivery can be planned.
- An outbreak that keeps recurring often enough to disrupt your life. That's when to discuss daily suppressive therapy.