This page is general health information, not medical advice. It cannot tell you whether you have an infection. A clinician can, and the testing options on this site are a good place to start.

Herpes testing is different from most other STI testing. The right test depends on whether there is a sore to sample right now. It also depends on what question you want answered.

This guide walks through the process in Los Angeles, step by step. It explains the swab test, the blood test, how to read the results, and what to do next.

Many people with herpes have no symptoms or very mild ones, according to the CDC. That is one reason the testing advice is more specific than "get a test." A clinician can help you choose the one that fits your situation.

What you will need

A list of what you have noticed. Write down when any bump, blister, sore, tingling or burning started and where it is.
A plan to be seen quickly if a sore is present. Swab results are most useful when the sore is fresh.
Your questions. A few examples are in step 2 below.
Insurance information, if you have it. You can still ask about care if you do not. Los Angeles County Department of Public Health (DPH) clinics say they charge patients no fees and do not charge a copay or coinsurance if insurance is billed.
A phone. DPH appointments go through one scheduling line, (213) 449-7009, and results are delivered through the LA Health Portal.

The two kinds of herpes tests, side by side

The CDC STI Treatment Guidelines (2021) describe two main approaches. They answer different questions.

Feature	Swab of a sore	Type-specific blood test
What it looks for	The virus itself, in fluid from a sore	Antibodies your body made in response to the virus
When it fits	When a sore or blister is present	When there is no sore to sample
Can it tell HSV-1 from HSV-2?	Yes	Yes, if it is a type-specific test
Can it say where the infection is?	It reflects the sore that was sampled	No, it cannot show whether infection is oral or genital
Main limit	A negative result does not rule out herpes, especially if the sore is old or healing	It can be negative early on, and weak positives can need confirmation

Step-by-step: how to approach herpes testing in Los Angeles

Step 1: Note whether a sore is present right now

This is the most important fork in the road. Herpes symptoms can include small blisters or open sores, itching, tingling, burning or pain, on or near the mouth, genitals or anus. Some outbreaks also come with flu-like feelings, according to the CDC.

Many other conditions can look similar. Razor irritation, ingrown hairs, yeast infections and other STIs can all cause bumps or sores. A clinician can look at the area and decide what to test for. You cannot tell by looking, and neither can a photo.

If a sore is present, try to be seen within a day or two. If it is not, a blood test may be an option to discuss, but see step 3 first.

Step 2: Choose a clinic and ask the right questions

Several Los Angeles clinics offer STI services. The local testing list at free and low-cost clinics in Los Angeles has the details. A few places to start:

Central Health Center (DPH Sexual Health Clinic), 241 Figueroa St., Los Angeles, CA 90012. DPH lists STD testing, HIV testing, PrEP, PEP, doxy-PEP and treatment. Appointments are preferred, with limited walk-ins.
MLK Jr. Center for Public Health (DPH Sexual Health Clinic), 11833 S. Wilmington Ave, Los Angeles, CA 90059. The services and walk-in policy are the same as above.
Los Angeles LGBT Center, McDonald/Wright Building, 1625 N. Schrader Blvd., Los Angeles, CA 90028. DPH's listing says walk-ins are accepted and same-day appointments are available, Monday to Friday, 10am to 7pm. The Center's page does not state the cost of STI testing, so ask when you call. The phone number is (323) 993-2997.
AHF Wellness Center - Western, 1811 N. Western Ave., Los Angeles, CA 90027. AHF's FAQ says it tests for gonorrhea, chlamydia, syphilis and HIV. It does not mention herpes, so ask before you go. The phone number is 1 (855) 783-2434.
APLA Health, Baldwin Hills (Out Here Sexual Health Center), 3741 S. La Brea Ave., Los Angeles, CA 90016. APLA says its Out Here sites offer free or low-cost sexual health services. The page does not state sliding-scale details. Call (213) 201-5000.
Children's Hospital Los Angeles, 3250 Wilshire Blvd., 3rd Floor, Los Angeles, CA 90010, lists STD services for people ages 12 to 24. The phone number is 1 (323) 361-7550. The cost is not published, so ask.

The DPH Sexual Health Clinics page does not say which specific herpes tests each clinic runs. So ask when you book: "Can I be evaluated for a sore, and can a swab be taken?" If you have no sore, ask: "Is a herpes blood test something we should discuss?"

The Pacoima Health Center offers screening only. DPH says people with symptoms or a possible exposure are directed to book at another DPH clinic for evaluation and treatment.

You can also look up other options through the CDC's GetTested locator.

Step 3: Understand why routine blood screening is not advised for everyone

This surprises many people. The CDC STI Treatment Guidelines (2021) do not recommend routine type-specific herpes blood testing for the general population who have no symptoms. The U.S. Preventive Services Task Force also recommends against routine serologic screening for genital herpes in adolescents and adults who have no symptoms.

The reasons are practical. A positive blood test cannot say when or where infection happened. Some results are false positives, and a result can bring worry without changing medical care. A clinician may still talk through testing in certain situations, for example when a sexual partner has been diagnosed with genital herpes. That is a conversation with a clinician, not a rule for or against any one person.

If you want a blood test anyway, say so. A clinician can explain what it can and cannot tell you.

Step 4: Get the swab, if there is a sore

The clinician looks at the area. They may open a blister gently or rub the sore with a small soft swab to collect fluid and cells. It can sting briefly. The sample goes to a lab.

The CDC guidelines say modern lab methods that detect the virus's genetic material (called NAAT or PCR) are more sensitive than older culture methods. If the lab uses a type-specific test, the result can say whether the virus is HSV-1 or HSV-2.

Timing matters. CDC notes that swab results can be negative when a sore is healing or has crusted over. So a negative swab alone does not settle the question. A clinician may suggest a repeat swab at a new outbreak or a blood test to add information.

Step 5: Get the blood test, if the clinician recommends it

This is a standard blood draw. The CDC says to use a type-specific test, which looks for antibodies to the proteins that differ between HSV-1 and HSV-2.

Antibodies take time to develop, so a very recent infection may not show up yet. The CDC says false-negative results can happen early. The guidelines also say weak positive results can be false positives and may need confirmation with a second test. A clinician can tell you how long to wait before a repeat test. The CDC does not give one fixed window for every person, so please follow the clinician's advice.

Step 6: Get your results and ask what they mean

DPH says results come through the LA Health Portal in about 2 to 10 business days. Other clinics have their own timelines, so ask before you leave.

Do not leave without knowing three things. First, which test was done. Second, which virus type was found, if any. Third, what the next step is.

HSV-1 and HSV-2: what the difference means

There are two types of herpes simplex virus. The CDC explains that HSV-1 is usually associated with oral herpes (often called cold sores), and HSV-2 is more often associated with genital herpes. Either type can infect the mouth or genital area, including through oral sex.

According to the CDC, HSV-1 now causes a large share of first genital herpes episodes in some groups. So a result of "HSV-1" does not tell you where the virus lives. A swab from a genital sore can show which type is there. A blood test generally cannot show the location.

Type can matter for what to expect. The CDC guidelines note that genital HSV-2 tends to cause recurrences more often than genital HSV-1. A clinician can explain what that may mean for you.

What the results may mean

These are general descriptions. Only a clinician can interpret your own results.

Positive swab. The virus was found in the sample from that sore. The lab can often say which type.
Negative swab. The virus was not detected in that sample. It may mean the sore is due to something else, or the sample may have missed the virus. A clinician will weigh this against how the sore looks.
Positive blood test. Antibodies to one type were found, which suggests past exposure to that virus. It does not show when infection happened or where.
Negative blood test. Antibodies were not detected. This may reflect no exposure, or testing too soon after one.
Low-positive blood test. The CDC guidelines advise caution and suggest confirmation with another test.

Herpes is not curable, but it is treatable and manageable. Treatment is prescribed by a clinician and can shorten outbreaks or lower how often they happen. Your clinician can talk through the options and what they mean for you.

Managing outbreaks with a clinician

A herpes result is not an emergency. The CDC describes outbreaks that are often milder and less frequent over time, though this varies by person.

A clinician can prescribe antiviral medicine for outbreaks. Some people also use a daily approach to reduce recurrences. Which one fits depends on how often outbreaks occur and your health history. Your clinician sets the medicine and plan, so this guide does not name amounts or schedules.

The CDC says condoms and daily suppressive treatment can lower the chance of passing herpes to a partner, but neither removes the chance entirely. Avoiding sex during an outbreak, including the early tingling stage, is also advised.

If you are pregnant or planning to be, tell your prenatal care provider about any history of herpes or a partner's diagnosis. The CDC has specific guidance for care near delivery.

Talking with partners

Disclosure is a personal decision, and it is easier with some preparation. Herpes is very common, and a result does not say anything about your character.

Choose a private, calm moment. It does not need to be right before sex.
Use plain facts. For example: "I had a test and it showed HSV-1. My clinician says it is manageable."
Share what you know about reducing risk, and invite questions.
Offer to share the CDC's herpes page or suggest your partner talk with their own clinician.

Partners of any gender can be affected, and this advice is the same for everyone.

Tips and common mistakes to avoid

Waiting for a sore to "look worse." A sore that has healed is harder to swab. Go while it is fresh.
Assuming a full panel includes herpes. Many STI panels do not. Ask by name.
Reading a blood result as proof of timing. It cannot show when or where infection happened.
Skipping the swab and asking only for blood. If there is a sore, the swab usually gives the more useful information.
Using a single negative to end the conversation. Ask the clinician whether a repeat test makes sense.
Testing alone for other STIs. Herpes testing does not cover chlamydia, gonorrhea, syphilis or HIV. See our guide on chlamydia symptoms, testing and treatment in Los Angeles, and the overview of where to get tested for STDs in Los Angeles.
Picking up unverified results from the internet. Photos and quizzes cannot identify a sore.

Privacy and young people

Under California Family Code section 6926, as amended by AB 499 (2011), a minor who is 12 or older may consent to care for infectious, contagious or communicable diseases, including STIs. DPH says its clinics tell patients 12 and older they can be tested and treated without their parents knowing. DPH clinics are also open to everyone regardless of citizenship, and DPH says it will not report immigration status.

A note on free home testing in Los Angeles County

The county's free "I Know" home kit, run by DPH's Division of HIV and STD Programs, is for chlamydia and gonorrhea. DPH describes it as a vaginal-swab kit for people with a vagina aged 12 to 44. It does not cover herpes. The program hotline is (800) 758-0880.

What to expect overall

A swab or blood test may give you a clearer picture, but neither tells the whole story alone. Results may come back positive, negative or unclear, and a clinician can explain which applies and what to do. Many people find the visit shorter and calmer than they feared.

If you are unsure where to start, you can call the LA County STD hotline at 800-758-0880 to find free testing. For HIV questions, DPH lists 800-367-AIDS (2437).

Herpes Testing in Los Angeles: Swab, Blood Tests and What the Results Mean