Asymptomatic Herpes: What You Need to Know

Whether it happened during the kissing and cold sores portion of Sex Ed or several years later during your first outbreak, most people never forget learning that the herpes simplex virus is incurable.

Look, our immune systems are incredible things — they can take an STD/STI (sexually transmitted infection) and fight pretty hard against whatever ulcers or lesions come with it. Unfortunately, herpes (also known as HSV-1, HSV-2, genital herpes, or cold sores) isn’t going anywhere.

Luckily, suppressive therapy can help protect your sexual partners. Antiviral medications and antiviral therapy can reduce your incidence of outbreaks and your risk of transmission. But even if the meds are working, and even if you have no symptoms, you can still spread herpes simplex virus (HSV) type 1 and 2.

Worried about getting herpes? Just had your first episode and are scared you’ll never be intimate again? Relax. We’ve covered the facts about asymptomatic herpes below, including how common it is, how contagious it is, and what to do if you think you have it.

Can herpes be asymptomatic? Yep. 

Having “asymptomatic herpes” means you’ve been infected with the herpes simplex virus but do not have outbreaks. For instance, you’re not showing visible sores, you don’t have any burning sensations and aren’t experiencing flu-like symptoms.

While it’s nice not to have noticeable symptoms of HSV, that doesn’t mean the virus isn’t active in your body. 

It’s possible to test positive for herpes antibodies but not suffer from outbreaks, which means your body has been exposed to the virus even if you’ve never had symptoms. 

So, you can still be carrying HSV-1 or HSV-2 and be asymptomatic and still transmit it to others through viral shedding. This is when the virus becomes active in your skin or mucus membranes (like in your nose, mouth, and genitals). 

Asymptomatic herpes is especially sneaky because it makes testing and diagnosis trickier. Since asymptomatic shedding signs aren’t always obvious, people may live for years without knowing they’re infected, unknowingly having episodes of viral shedding and passing the virus to partners. 

According to research, 75 to 90 percent of people with genital herpes aren’t actually aware they’re infected. Why? They never develop visible herpes sores and suffer very mild symptoms — if any.

That’s why herpes is so common — and why education and testing matter.

Herpes is, unfortunately, one of the most common viral infections in people — more than half of adults under 50 are infected with the HSV-1 type of herpes. 

In addition, according to World Health Organization (WHO) data, an estimated 13 percent of people aged 15 to 48 are infected with the HSV-2 virus.

Symptoms of herpes first appear in an initial outbreak, followed by subsequent outbreaks.

Initial herpes and cold sore outbreaks are often characterized by itching and burning around the genitals or mouth. Blisters can form in the affected area within 24 hours and develop open, fluid-filled sores at the site of the herpes outbreak.

One of the most common herpes-related questions is whether it’s possible to be infected with the herpes virus without ever experiencing symptoms. We think this really speaks to how surprised many people are to hear about asymptomatic shedding.

Genital herpes and oral herpes are contagious without active sores or symptoms of the virus. And since many people don’t even know they’re carrying the virus, it’s arguably more common not to experience any symptoms of herpes than it is to have a symptomatic infection.

While some folks mistake this as an immunity to herpes, that’s not how it works.

Those with asymptomatic herpes infections may not experience symptoms, but they’ll still likely test positive for the virus and can spread it to other people through oral or sexual contact. 

Though the risk of virus transmission is lower in asymptomatic people, they still have episodes of viral shedding when transmission can occur.

And for the record, there’s no “How to prevent viral shedding” guide here — because you can’t. There’s always a chance of viral shedding from herpes, even if you’re an asymptomatic carrier of the virus.

What Are the Odds of Getting Herpes from an Asymptomatic Partner?

While it’s true that the risk of transmission is lower when a partner has no symptoms, it’s not zero. 

Asymptomatic people can still shed the virus and infect others, especially during unprotected sex. In fact, most new herpes infections are transmitted by people who don’t know they have it. 

Using condoms consistently and taking daily antiviral medication can significantly reduce the risk, but if you’re sexually active with someone who has herpes — even without symptoms — there’s always a chance of transmission.

The risk goes up with the number of partners you have, how often you’re having sex, and how often condoms are being used. Also, women are at a greater risk of contracting herpes than men.

If you think you might have asymptomatic herpes, speak to your healthcare provider about testing options and find out as soon as you can.

Your healthcare provider will schedule a blood test or another test based on when you think you were exposed to the virus.

The most accurate testing method for asymptomatic patients is an IgG (immunoglobulin) test. The IgG test checks for IgG antibodies in your blood, which can signal a herpes infection. 

These antibodies can take months to form after a herpes infection, so you’ll typically need to wait at least 12 to 16 weeks from your last sexual or oral contact with others before testing to ensure accurate results.

In the meantime, you may be wondering whether a condom is adequate protection. Though condoms can reduce the chance of transmission, herpes often spreads to and from other parts of the genital area.

The best solution is a combination of condoms and medication, according to the CDC (Centers for Disease Control and Prevention).

Treatment medications like valacyclovir and famciclovir can treat genital herpes by reducing the virus’s ability to reproduce.

Learn more about how fast valacyclovir works, the valacyclovir transmission rate, and the difference between valacyclovir and acyclovir on our blog.

We also have tips for safely having sex with herpes.

A genital herpes infection can feel like the end of the world for your sex life. But the reality is that the prevalence of sexually transmitted infections is pretty high, and — as long as you’re careful and honest — you can still have a rewarding and happy sex life.

That said, it’s crucial to carefully manage sexually transmitted infections like herpes before, during, and after sexual activity.

Here’s what to remember:

• The oral and genital herpes simplex virus types are extremely common, as are asymptomatic genital herpes and oral herpes.

• Various antiviral medications can help minimize the severity and frequency of outbreaks. But they don’t reliably prevent HSV-1 infection or HSV-2 infection, according to the CDC.

• To protect your partners and yourself, medication, condom use, and testing are the best triple-threat defense.

• If you think you might have contracted herpes from penetrative sex, oral sex, or another type of sexual activity, contact a clinician or another healthcare provider to schedule a test.

Want more help? Our sexual health resources are a great way to learn the difference between HSV-1 and HSV-2 and how herpes medication like valacyclovir works.