About Our HSV-2 (Genital Herpes) Test
A genital herpes test is used to look for evidence of infection with herpes simplex virus 2 (HSV-2). HSV-2 is a virus that most often causes genital herpes and remains in the body after exposure, even when symptoms are not present.
HSV-2 is commonly associated with genital herpes, which can cause sores, blisters, or irritation in the genital or anal area. Some people notice HSV-2 symptoms, while others may not have any visible signs. Because symptoms can vary, a genital herpes test may be used to help evaluate possible infection based on your symptoms, history, and timing of exposure.
Purpose of the Test
The purpose of a herpes test is to detect signs of HSV-2 infection and help guide the next steps in care. An HSV-2 may be recommended for several reasons, including:
- Evaluating sores, blisters, or irritation that may be linked to HSV-2
- Confirming whether HSV-2 is present in a current genital lesion
- Identifying prior exposure to HSV-2 when symptoms are not present
- Helping inform conversations about transmission and partner risk
- Assessing possible infection in people with weakened immune systems or specific clinical concerns
A provider may consider your symptoms, possible exposure, and health history when deciding whether testing is appropriate.
What Does Our HSV-2 (Genital Herpes) Test Measure?
A genital herpes test looks for evidence of herpes simplex virus 2 using different laboratory methods. The type of HSV-2 test used depends on whether a sore is present and how recently symptoms or exposure occurred.
- PCR testing: PCR testing is a type of Nucleic Acid Amplification Test (NAAT) that specifically detects HSV-2 genetic material from a sample taken from a sore. It is the preferred method when active lesions are present because it is highly sensitive and can identify the virus type.
- Viral culture: Viral culture involves collecting fluid from a sore and attempting to grow the virus in a laboratory. It can confirm HSV-2, but it is less sensitive than PCR, especially once a lesion begins to heal.
- Antibody testing: Blood tests, including an HSV-2 blood test, look for antibodies produced by the immune system. These tests can indicate prior exposure, even without symptoms, but they cannot determine when the infection occurred or where it is located.
- Tzanck smear: This older test examines cells from a lesion under a microscope. It is rarely used today because it cannot reliably distinguish between HSV types, such as Varicella zoster (shingles), and has lower accuracy than newer methods.
The accuracy of an HSV-2 test depends on the type of test used and when the sample is collected. A healthcare provider can help determine which testing method may be most appropriate for your situation.
When Should I Get a Genital Herpes Test?
An HSV-2 test may be recommended if you have symptoms that could be linked to HSV-2 or if there has been a possible exposure. Some people seek testing after noticing symptoms, while others may not have any visible signs.
If you’re wondering how common is HSV-2, about 12% (1 of 8) of people ages 14-49 have genital HSV-2 infection in the U.S.; however, as many 90% are unaware they have the virus. Because symptoms are not always present, testing decisions are usually based on symptoms, exposure, and individual risk factors.
HSV-2 transmission occurs through close skin-to-skin contact, most often during sexual activity; however, oral herpes may be passed on through kissing or oral sex. The virus can be spread even when no symptoms are visible, which is why testing may be considered in certain situations.
Testing may be appropriate if you experience HSV-2 symptoms such as:
- Blisters or sores in the genital, anal, buttocks, or thigh areas
- Pain or irritation during urination (dysuria)
- Itching, tingling, or burning sensations before sores appear
- Crusting or open sores after blisters break
- Flu-like symptoms during an initial outbreak
- Vaginal or rectal discharges
Symptoms can vary from person to person. HSV-2 symptoms in females may include sores on the vulva, vagina, or cervix, while HSV-2 symptoms in males may include sores on the penis or scrotum. Some people have mild symptoms that are easy to miss, while others may have more noticeable outbreaks.
Routine testing is not recommended for people without symptoms. Blood tests can sometimes produce false-positive results and cannot determine when or where the infection occurred, which can make results harder to interpret without a clear clinical reason.
Testing may still be considered in certain situations, including:
- You have symptoms that may be related to HSV-2
- You have had close contact with someone who has a known HSV infection
- You want to better understand your status after a possible exposure
- You have a weakened immune system, and a provider recommends testing
- A clinician is evaluating symptoms in a newborn or another higher-risk situation
A health care provider can help you decide whether testing is right for you based on your symptoms, possible exposure, and health history.
Finding a Genital Herpes Test
How to Get Tested
If you’re looking into how to test for herpes 2, a genital herpes test is available at doctor’s offices, urgent care clinics, sexual health clinics, and community testing centers.
With an active sore, a provider may take a swab of the sore or a blister and submit the sample to a lab for a virus culture or a highly specific PCR test. If no sores are present, a herpes blood test for IgG antibodies may be used; however, it takes time for the IgG antibodies to reach a detectable level.
A provider can help determine which option fits your symptoms and timing.
Can I Take a Test at Home?
Taking a genital herpes test at home may be an option for people who prefer more privacy. Because these tests are a type of herpes blood test, they look for antibodies rather than the virus. This means they may not detect very recent infections or show where the virus is located.
An HSV-2 test at home, sometimes sold as a genital herpes test kit or HSV-2 test kit, typically involves collecting a small blood sample with a finger prick and sending it to a lab.
How Much Does the Test Cost?
The cost of testing for an HSV-2 test depends on the type of test ordered, where it’s performed, and whether insurance is involved.
A blood test for genital herpes may be covered by insurance when ordered by a provider, though copays or deductibles may apply. Costs can vary for a herpes swab test, herpes PCR test, or a genital herpes test at home.
Checking with a clinic or testing service ahead of time can help you understand what to expect.
Taking an HSV-2 (Genital Herpes) Test
A genital herpes test may involve having a sample taken from a sore or your blood, depending on your symptoms. A health care provider usually collects these samples in a clinical setting, although some options are available at home.
Before the Test
Preparation depends on the type of sample being collected. For a herpes swab test or herpes PCR test, the sample should be taken while a sore is active and has not started to heal.
For a blood test, no special preparation is usually required. Let your provider know about any medications or supplements you are taking (e.g., antivirals, biotin supplements, steroids), as well as when symptoms or possible exposure occurred.
During the Test
The testing process varies based on the method used. For a swab test, a provider gently collects fluid or cells from a sore using a sterile swab. This process is quick and may cause mild discomfort.
For a blood test, a small sample is collected from a vein in your arm or with a finger prick. Blood collection typically takes only a few minutes.
After the Test
After a swab test, there are no special restrictions. You may notice slight tenderness at the collection site, but this usually goes away quickly.
After a blood draw, mild soreness or bruising can occur. Most people can return to normal activities right away.
Results are typically available within a few days, depending on the type of test and the lab processing the sample. A health care provider can help explain what your results may mean and discuss next steps if needed.