Genital herpes is a sexually transmitted infection caused by two types of herpes simplex virus: HSV-1 and HSV-2. About 12% of Americans aged 14 to 49 carry HSV-2, the type most associated with genital outbreaks, while nearly 48% carry HSV-1, which traditionally causes cold sores but can also infect the genitals through oral sex. Most people with genital herpes don’t know they have it, because the infection often produces mild symptoms or none at all.
HSV-1 vs. HSV-2: What’s the Difference
Both viruses belong to the same family and cause similar-looking sores, but they behave differently depending on where they settle. HSV-1 prefers the nerve clusters near the base of the skull, which is why it typically shows up as cold sores around the mouth. HSV-2 favors the nerve clusters near the base of the spine, making it more likely to cause genital outbreaks. Either virus can infect either location, though. HSV-1 is an increasingly common cause of genital herpes, usually transmitted when someone with oral HSV-1 performs oral sex on a partner.
The practical distinction matters most for recurrence. HSV-2 in the genital area tends to reactivate more frequently, sometimes several times a year, especially in the first year after infection. Genital HSV-1, by contrast, recurs far less often. Knowing which type you have helps predict what to expect long-term.
What an Outbreak Looks and Feels Like
A first outbreak is usually the worst. It can cause painful genital ulcers, flu-like symptoms including fever and swollen lymph nodes, and in some cases neurological symptoms like headaches or difficulty urinating. This initial episode can last two to three weeks if untreated, sometimes longer. Many people are caught off guard by the severity because they associate herpes with minor cold sores.
Before sores appear, many people experience a warning phase called the prodrome: tingling, burning, or shooting pain at the site where blisters are about to form. This prodrome can last a few hours to a couple of days. The sores themselves start as small fluid-filled blisters, break open into shallow ulcers, then crust over and heal without scarring. Recurrent outbreaks follow the same pattern but are typically shorter and less painful, often resolving within a week.
Not everyone gets obvious sores. Some people experience symptoms so mild they mistake them for razor burn, yeast infections, or ingrown hairs. Others never notice symptoms at all. This is one of the main reasons herpes spreads so easily.
How It Spreads, Even Without Symptoms
Genital herpes spreads through skin-to-skin contact with an infected area, whether or not sores are visible. The virus periodically reactivates and travels to the skin surface without producing noticeable lesions, a process called viral shedding. Research tracking daily genital swabs found that people with symptomatic HSV-2 shed the virus on about 20% of days, while those who have never noticed symptoms still shed on roughly 10% of days. Among people without recognized symptoms, more than 80% of their shedding days were completely silent, with no sores or discomfort.
The amount of virus released during these silent episodes is comparable to what’s shed during visible outbreaks. This means someone who has never had a noticeable outbreak can still transmit the virus to a partner, and in fact, most new genital herpes infections are acquired from people who don’t realize they’re infected.
Testing and Diagnosis
If you have an active sore, the most reliable test is a swab taken directly from the blister or ulcer. This works best when the sore is fresh and hasn’t started to crust over or heal. The swab is analyzed to detect viral DNA, which is highly accurate when performed correctly.
If you don’t have active sores, a blood test can check for antibodies your immune system produces in response to the virus. These tests can distinguish between HSV-1 and HSV-2. The catch is timing: after exposure, it can take up to 16 weeks for antibody levels to become detectable. Testing too early can produce a false negative. Routine herpes screening isn’t part of standard STI panels in most settings, so you typically need to request it specifically.
Treatment Options
There is no cure for genital herpes. Once the virus enters the body, it retreats into nerve cells and stays there permanently. Antiviral medications don’t eliminate the virus, but they significantly reduce the severity and frequency of outbreaks and lower the risk of transmitting the infection to a partner.
Treatment falls into two categories. Episodic therapy means taking antiviral medication at the first sign of an outbreak (ideally within 24 hours of symptoms or during the prodrome) to shorten its duration and reduce severity. A first episode is typically treated for 7 to 10 days. Recurrent episodes require shorter courses. If sores haven’t healed after 10 days, treatment can be extended.
Suppressive therapy means taking a low dose of antiviral medication every day, whether or not you’re having an outbreak. This approach is commonly chosen by people who experience frequent recurrences or who want to reduce the risk of passing the virus to a sexual partner. Daily suppressive therapy cuts outbreak frequency significantly and reduces viral shedding.
Reducing Transmission Risk
Consistent condom use lowers the risk of acquiring HSV-2 by about 30%, according to a pooled analysis of clinical studies. That’s meaningful but far from complete protection, because herpes can affect skin that condoms don’t cover, including the upper thighs, buttocks, and areas around the genitals.
Combining condoms with daily suppressive antiviral therapy offers stronger protection. Avoiding sexual contact during active outbreaks and prodromal symptoms (tingling or burning before sores appear) further reduces risk. No single strategy eliminates the possibility of transmission entirely, but layering these approaches together brings the risk down substantially.
The Connection to HIV
Having genital herpes roughly triples the risk of acquiring HIV if you’re exposed to it. This happens through several mechanisms. Herpes sores create breaks in the skin and mucous membranes that HIV can enter through. Even without visible sores, HSV-2 reactivation draws immune cells to the genital area, and these are the very cells HIV targets for infection. For people already living with both viruses, herpes outbreaks increase the amount of HIV in genital secretions, making transmission to partners more likely.
Herpes During Pregnancy
The biggest concern is passing the virus to a baby during vaginal delivery, which can cause a serious condition called neonatal herpes. The risk depends heavily on timing. A woman who acquires genital herpes for the first time late in pregnancy has a transmission risk as high as 57%, because her body hasn’t yet produced the antibodies that would offer some protection to the baby. For women with a history of recurrent herpes, the risk during delivery drops to around 2%.
Current obstetric guidelines recommend that pregnant women with recurrent genital herpes begin daily suppressive antiviral therapy at 36 weeks to reduce the chance of an outbreak near delivery. If active sores or prodromal symptoms are present when labor begins, a cesarean delivery is recommended. Women with a history of herpes but no active lesions or symptoms at the time of delivery can generally deliver vaginally.
Living With Genital Herpes
For most people, genital herpes becomes a manageable condition rather than a defining one. Outbreaks tend to become less frequent and less severe over time, particularly with HSV-2, which often settles into a pattern of occasional or rare recurrences after the first year or two. Many people experience only one or two outbreaks in their lifetime.
The emotional impact of a diagnosis often hits harder than the physical symptoms. Stigma around herpes is disproportionate to the actual health consequences for most people. Understanding that nearly half the U.S. population carries HSV-1 and roughly 1 in 8 carries HSV-2 can help put the diagnosis in perspective. Open communication with sexual partners, knowledge of your specific virus type, and a treatment plan that fits your situation are the most practical steps forward.