KISS SEXUAL HEALTH GUIDE

When should you test?

Different STIs become detectable at different times. Find the right testing window, understand which test you need, and know when waiting is the wrong move.

Possible HIV exposure within 72 hours?
Seek medical care now and ask whether PEP is appropriate. Do not wait for a testing window.

~2 weeks

Chlamydia + gonorrhea

~6 weeks

Syphilis

10–33 days

HIV NAT

Get care now

Symptoms or a partner’s positive result

Within 72h

The HIV PEP emergency window

Urine ≠ full screen

Throat or rectal swabs may be needed

Repeat testing

An early negative may not be final

Testing windows, without the confusion.

STI testing windows: After a new sexual encounter or possible STI exposure, it is natural to want answers immediately. However, testing the following morning may not provide a complete answer.

Different sexually transmitted infections become detectable at different times. This delay is called the testing window period.

Testing too early can produce a negative result even when an infection is present. The right time to test depends on:

The STI
The type of test
The part of the body that was exposed
Whether you have symptoms
Whether a partner tested positive
Your medical history
Whether you are taking PrEP, PEP or other medications

This guide provides general testing timelines. A healthcare provider or sexual-health clinic may recommend testing sooner, later or more than once based on your situation.

KISS can help you privately record encounters, remember testing dates, set testing reminders and notify partners anonymously when needed.

Do Not Wait to Seek Care After an Urgent Exposure

Testing windows should not prevent someone from getting medical care immediately.

Contact a healthcare provider, sexual-health clinic, urgent care center or emergency department as soon as possible if:

You may have been exposed to HIV within the last 72 hours
You may have been exposed to hepatitis B and are not fully vaccinated
A partner tells you they tested positive for an STI
You develop sores, blisters, discharge, pelvic pain or testicular pain
You experience fever, a widespread rash or severe abdominal pain
You are pregnant and may have been exposed
The exposure occurred during sexual assault

HIV post-exposure prophylaxis, commonly called PEP, must generally be started within 72 hours of a possible exposure. The sooner treatment begins, the better.

Post-exposure care for hepatitis B may also be time-sensitive. CDC hepatitis B post-exposure guidance explains when vaccination or hepatitis B immune globulin may be recommended.

Possible HIV exposure within the last 72 hours?
Do not wait for an HIV testing window to pass. Contact a healthcare provider, urgent care center or emergency department now to ask whether PEP is appropriate.

What Is an STI Testing Window Period?

An STI testing window period is the time between acquiring an infection and the point when a particular test can reliably detect it.

During the window period:

An infection may already be present
The infection may still be transmissible
You may or may not have symptoms
A test may return a negative result because there is not yet enough bacterial, viral, antigen or antibody material to detect

A negative result shortly after exposure does not always rule out an infection. A provider may recommend an initial test followed by repeat testing after the applicable window period.

STI Testing Window Period vs. Incubation Period

These terms sound similar, but they mean different things.

Window period:
The time between exposure and when a test can detect the infection.

Incubation period:
The time between exposure and when symptoms may develop.

Result turnaround time:
The time a clinic or laboratory takes to process your sample and return the result.

Symptoms can begin before or after a test becomes positive. Many STIs cause no noticeable symptoms, which is why symptoms alone cannot determine whether someone has an infection.

Learn more about why testing matters in our guide, Can You Have an STI or STD Without Symptoms?

Quick STI Testing Window Period Guide

These are general timelines rather than guarantees. Testing technology, individual circumstances and clinical recommendations can differ.

Infection	General testing guidance after exposure	Common test
Chlamydia	Around 2 weeks	Urine or swab NAAT
Gonorrhea	Around 2 weeks	Urine or swab NAAT
Syphilis	Around 6 weeks; repeat testing may be recommended	Blood test
HIV NAT	Usually 10–33 days	Blood from a vein
HIV laboratory antigen/antibody test	Usually 18–45 days	Blood from a vein
HIV rapid antigen/antibody test	Usually 18–90 days	Finger-stick blood
HIV antibody or most self-tests	Usually 23–90 days	Blood or oral fluid
Hepatitis C RNA	Approximately 1–2 weeks	NAT blood test
Hepatitis C antibody	Approximately 8–11 weeks	Antibody blood test
Herpes blood test	May take up to 16 weeks or longer	Type-specific antibody test
Herpes with an active sore	Test the sore as soon as possible	Lesion swab
Trichomoniasis	Discuss timing with a provider	Vaginal swab or urine test
HPV	No general post-exposure HPV-status test	Cervical screening when appropriate
Hepatitis B	Seek prompt professional guidance	Blood tests

NHS Inform’s STI testing guidance uses approximately two weeks for chlamydia and gonorrhea and six weeks for syphilis as practical testing windows. HIV timelines depend on the specific test used.

Chlamydia Testing Window Period

Chlamydia is normally tested using a nucleic acid amplification test, commonly called a NAAT. The sample may involve:

Urine
A vaginal or cervical swab
A rectal swab
A throat swab

A practical testing window for chlamydia is approximately two weeks after exposure. Some infections may be detected earlier, but testing during the first several days can miss a recent infection.

Do not automatically wait two weeks if:

You have symptoms
A partner tested positive
A healthcare provider told you to test immediately
You are pregnant
You need an initial baseline test

A provider may test or treat you immediately and recommend another test later.

Someone can have chlamydia in the throat or rectum even when a urine test is negative. Testing should include the body locations involved in the sexual encounter.

Read the complete KISS guide: Chlamydia: Symptoms, Testing, Treatment and Partner Notification.

Gonorrhea Testing Window Period

Gonorrhea is also commonly diagnosed with a NAAT using urine or a swab.

A practical gonorrhea testing window is approximately two weeks after exposure. Earlier testing may identify some infections, but a negative result obtained too soon may need to be repeated.

The test must match the location exposed:

A urine or genital test checks for genital or urethral gonorrhea
A throat swab checks for throat gonorrhea
A rectal swab checks for rectal gonorrhea
A vaginal or cervical swab checks for vaginal or cervical infection

A urine test does not reliably rule out a separate infection in the throat or rectum. CDC advises people who have had oral or anal sex to discuss throat and rectal testing with a provider.

Read the complete KISS guide: Gonorrhea: Symptoms, Testing, Treatment and Prevention.

Syphilis Testing Window Period

Syphilis is usually diagnosed through blood testing. In some situations, a provider may also test material from a sore.

Syphilis blood tests do not always become positive immediately. Many sexual-health services use approximately six weeks after exposure as a practical initial window.

A provider may recommend another test at approximately three months when:

The initial test was performed early
The exposure was considered higher risk
Symptoms develop
A partner has confirmed syphilis
There is an ongoing possibility of exposure

Do not wait until the end of the window period if you develop a sore, rash or other possible symptoms. A healthcare provider can evaluate you immediately and determine whether treatment or repeat testing is appropriate.

Read the complete KISS guide: Syphilis: Symptoms, Testing, Treatment, Stages and Prevention.

HIV Testing Window Periods

There is no single HIV window period because different HIV tests look for different markers.

HIV Nucleic Acid Test

A nucleic acid test, or NAT, looks for the virus itself in blood.

A NAT can usually detect HIV approximately 10 to 33 days after exposure.

Laboratory Antigen/Antibody Test

A laboratory antigen/antibody test checks for HIV antibodies and the p24 antigen.

When performed using blood from a vein, it can usually detect HIV approximately 18 to 45 days after exposure.

Rapid Finger-Stick Antigen/Antibody Test

A rapid antigen/antibody test performed using finger-stick blood can usually detect HIV approximately 18 to 90 days after exposure.

HIV Antibody Test

Most rapid tests and HIV self-tests are antibody tests. They can usually detect HIV approximately 23 to 90 days after exposure.

When an HIV test is negative following a recent exposure, CDC recommends testing again after the window period for the specific test used.

Do Not Wait to Ask About PEP

PEP may reduce the likelihood of acquiring HIV after a qualifying exposure, but it needs to be started within 72 hours.

Do not wait for an HIV test to reach its final window period before asking about PEP.

Read the KISS guide: HIV: Testing, PrEP, Symptoms and Prevention.

Herpes Testing Window Period

Herpes testing depends heavily on whether symptoms are present.

Testing an Active Sore

When a blister, ulcer or sore is present, a healthcare provider may swab the lesion.

The sore should be evaluated as soon as possible. A lesion swab is most useful before the sore begins healing.

Herpes Blood Testing

A type-specific herpes blood test looks for antibodies to HSV-1 or HSV-2. According to CDC herpes-testing guidance, it can take up to 16 weeks or longer after exposure for current blood tests to detect an infection.

A herpes blood test:

Cannot determine exactly when the infection occurred
Cannot identify which partner transmitted it
May not identify the body location of an HSV-1 infection
Can produce false-positive results
Is not routinely recommended for every person without symptoms

Discuss herpes testing with a healthcare provider, particularly when symptoms are present or a partner has herpes.

Read the complete KISS Herpes Guide. KISS’s existing herpes resource also explains that standard STI panels do not always include HSV testing.

Hepatitis C Testing Window Period

Two major types of hepatitis C tests have different window periods.

Hepatitis C RNA Test

An HCV RNA test looks for genetic material from the virus. HCV RNA can become detectable approximately one to two weeks after exposure.

Hepatitis C Antibody Test

A hepatitis C antibody test looks for the immune system’s response to the virus. Antibodies usually become detectable approximately eight to eleven weeks after exposure.

Someone exposed within the previous six months may need an HCV RNA test instead of relying only on an antibody test.

Read more from the CDC about hepatitis C diagnosis and testing.

Hepatitis B Testing After Exposure

Hepatitis B testing can involve several blood markers, including:

Hepatitis B surface antigen
Hepatitis B surface antibody
Hepatitis B core antibody

The correct tests and timing depend on vaccination history, previous infection and the type of exposure.

Do not wait for follow-up testing after a known hepatitis B exposure. Someone who is unvaccinated or unsure of their vaccination status should contact a healthcare provider promptly.

CDC hepatitis B post-exposure guidance explains when vaccination, testing or hepatitis B immune globulin may be appropriate.

Trichomoniasis Testing After Exposure

Trichomoniasis may be tested using a vaginal swab, urine sample or another laboratory method, depending on the clinic and a person’s anatomy.

Many people with trichomoniasis do not develop symptoms. When symptoms occur, they may appear approximately 5 to 28 days after infection, although they can begin later.

There is no single testing timeline that applies to every person and test. Contact a provider when:

A partner tested positive
You develop discharge, irritation or pain
You are pregnant
You want testing following a possible exposure

Read more from the CDC about trichomoniasis.

Can You Test for HPV After an Exposure?

There is no general test that can determine a person’s overall HPV status following a sexual encounter.

According to CDC information about genital HPV:

There is no approved routine HPV test for the mouth or throat
HPV tests are not used as general STI screening tests for men
HPV testing is used in certain cervical-cancer screening situations
Testing is not normally performed simply because a partner has HPV or genital warts

People with a cervix should follow recommended cervical-cancer screening schedules based on age, health history and previous results.

Read the complete KISS guide: HPV: Types, Symptoms, Cancer Risk, Vaccine and Prevention.

Should You Get Tested Immediately After Sex?

There are situations in which immediate testing is still useful.

An initial appointment may allow a provider to:

Test for infections acquired before the most recent encounter
Establish baseline HIV or hepatitis results
Examine symptoms or sores
Test the correct anatomical locations
Discuss HIV PEP
Provide hepatitis vaccination or post-exposure care
Treat an infection when a partner has already tested positive
Schedule repeat testing

An immediate negative result may not rule out infection from a very recent encounter. The provider may ask you to return after the relevant window period.

What If a Partner Tested Positive?

Do not simply wait several weeks and hope that a later test is negative.

Contact a healthcare provider or sexual-health clinic and tell them:

Which infection the partner reported
When your most recent sexual contact occurred
What type of sexual contact occurred
Which body locations may have been exposed
Whether you have symptoms
Whether you are pregnant
Whether you use PrEP
Whether you have received hepatitis A, hepatitis B or HPV vaccines

Depending on the infection, a provider may recommend immediate testing, treatment or follow-up testing.

KISS provides a private way to send an anonymous STI notification so previous partners know they may need testing or treatment.

Why Testing the Correct Body Site Matters

A standard urine test may not provide a complete STI screening.

Depending on the sexual contact involved, testing may require:

Urine or a urethral sample after genital exposure
A vaginal or cervical swab for vaginal or cervical infection
A throat swab after oral exposure
A rectal swab after receptive anal exposure
A blood test for HIV, syphilis or hepatitis
A lesion swab when sores or blisters are present

Someone can have an infection in one body location and test negative at another.

For example:

A urine test may be negative while throat gonorrhea is present
A genital test may be negative while rectal chlamydia is present
A blood test does not replace a swab for gonorrhea or chlamydia
An HIV test does not automatically include syphilis or hepatitis testing

CDC notes that STI testing can involve blood, urine and swabs from the vagina, throat or rectum.

Ask the clinic exactly which infections and body locations are included in your screening.

What If Your Result Is Negative?

A negative result means that no infection was detected by that test at the time the sample was collected. It does not always mean that every STI has been ruled out.

Consider asking:

Was I tested after the full window period?
Which specific STIs were included?
What type of HIV test did I receive?
Were my throat and rectum tested?
Do I need repeat testing?
Could medication affect my recommended follow-up schedule?
Should my partner also be tested?

If symptoms develop after a negative test, contact a healthcare provider instead of assuming that the previous result rules out every infection.

Testing After STI Treatment Is Different

Testing after treatment is not the same as testing following an initial exposure.

CDC generally recommends retesting approximately three months after treatment for:

Chlamydia
Gonorrhea
Trichomoniasis in sexually active women

The purpose is largely to identify reinfection, which can occur when partners have not been treated or following a new exposure.

Read the CDC guidance about retesting after STI treatment.

Some infections have additional follow-up requirements. For example, throat gonorrhea normally requires a test of cure 7–14 days after treatment, while syphilis follow-up depends on the infection stage and treatment received.

Follow the schedule provided by the healthcare professional who treated you.

How Often Should You Get Routine STI Testing?

Testing after one encounter is different from maintaining a routine testing schedule.

CDC recommends at least annual testing for syphilis, chlamydia and gonorrhea for sexually active gay, bisexual and other men who have sex with men. Testing every three to six months may be appropriate for people with multiple or anonymous partners.

Testing recommendations for other people depend on age, anatomy, pregnancy, sexual practices, partners and individual circumstances.

Read the KISS guide: How Often Should You Get Tested for STDs and STIs?.

How KISS Helps You Stay on Track

Remembering multiple testing windows and follow-up dates can be difficult.

KISS helps users:

Record encounters privately
Keep track of testing dates
Set future STI testing reminders
Record screening information
Access stigma-free sexual-health education
Receive private partner alerts
Notify previous partners anonymously when needed

Testing is not about blame, shame or judging someone’s sex life. It is a normal part of taking care of your health and giving yourself better information.

Download KISS for iPhone or download KISS from Google Play.

STI Testing Window Periods: How Soon After Sex Should You Get Tested?
After a new sexual encounter or possible STI exposure, it is natural to want answers immediately. However, testing the following morning may not provide a complete answer.
Different sexually transmitted infections become detectable at different times. This delay is called the testing window period.
Testing too early can produce a negative result even when an infection is present. The right time to test depends on:
The STI
The type of test
The part of the body that was exposed
Whether you have symptoms
Whether a partner tested positive
Your medical history
Whether you are taking PrEP, PEP or other medications
This guide provides general testing timelines. A healthcare provider or sexual-health clinic may recommend testing sooner, later or more than once based on your situation.
KISS can help you privately record encounters, remember testing dates, set testing reminders and notify partners anonymously when needed.
Do Not Wait to Seek Care After an Urgent Exposure
Testing windows should not prevent someone from getting medical care immediately.
Contact a healthcare provider, sexual-health clinic, urgent care center or emergency department as soon as possible if:
You may have been exposed to HIV within the last 72 hours
You may have been exposed to hepatitis B and are not fully vaccinated
A partner tells you they tested positive for an STI
You develop sores, blisters, discharge, pelvic pain or testicular pain
You experience fever, a widespread rash or severe abdominal pain
You are pregnant and may have been exposed
The exposure occurred during sexual assault
HIV post-exposure prophylaxis, commonly called PEP, must generally be started within 72 hours of a possible exposure. The sooner treatment begins, the better.
Post-exposure care for hepatitis B may also be time-sensitive. CDC hepatitis B post-exposure guidance explains when vaccination or hepatitis B immune globulin may be recommended.
Possible HIV exposure within the last 72 hours?
Do not wait for an HIV testing window to pass. Contact a healthcare provider, urgent care center or emergency department now to ask whether PEP is appropriate.
What Is an STI Testing Window Period?
An STI testing window period is the time between acquiring an infection and the point when a particular test can reliably detect it.
During the window period:
An infection may already be present
The infection may still be transmissible
You may or may not have symptoms
A test may return a negative result because there is not yet enough bacterial, viral, antigen or antibody material to detect
A negative result shortly after exposure does not always rule out an infection. A provider may recommend an initial test followed by repeat testing after the applicable window period.
Window Period vs. Incubation Period
These terms sound similar, but they mean different things.
Window period:
The time between exposure and when a test can detect the infection.
Incubation period:
The time between exposure and when symptoms may develop.
Result turnaround time:
The time a clinic or laboratory takes to process your sample and return the result.
Symptoms can begin before or after a test becomes positive. Many STIs cause no noticeable symptoms, which is why symptoms alone cannot determine whether someone has an infection.
Learn more about why testing matters in our guide, Can You Have an STI or STD Without Symptoms?
Quick STI Testing Window Period Guide
These are general timelines rather than guarantees. Testing technology, individual circumstances and clinical recommendations can differ.
Infection General testing guidance after exposure Common test
Chlamydia Around 2 weeks Urine or swab NAAT
Gonorrhea Around 2 weeks Urine or swab NAAT
Syphilis Around 6 weeks; repeat testing may be recommended Blood test
HIV NAT Usually 10–33 days Blood from a vein
HIV laboratory antigen/antibody test Usually 18–45 days Blood from a vein
HIV rapid antigen/antibody test Usually 18–90 days Finger-stick blood
HIV antibody or most self-tests Usually 23–90 days Blood or oral fluid
Hepatitis C RNA Approximately 1–2 weeks NAT blood test
Hepatitis C antibody Approximately 8–11 weeks Antibody blood test
Herpes blood test May take up to 16 weeks or longer Type-specific antibody test
Herpes with an active sore Test the sore as soon as possible Lesion swab
Trichomoniasis Discuss timing with a provider Vaginal swab or urine test
HPV No general post-exposure HPV-status test Cervical screening when appropriate
Hepatitis B Seek prompt professional guidance Blood tests
NHS Inform’s STI testing guidance uses approximately two weeks for chlamydia and gonorrhea and six weeks for syphilis as practical testing windows. HIV timelines depend on the specific test used.
Chlamydia Testing Window Period
Chlamydia is normally tested using a nucleic acid amplification test, commonly called a NAAT. The sample may involve:
Urine
A vaginal or cervical swab
A rectal swab
A throat swab
A practical testing window for chlamydia is approximately two weeks after exposure. Some infections may be detected earlier, but testing during the first several days can miss a recent infection.
Do not automatically wait two weeks if:
You have symptoms
A partner tested positive
A healthcare provider told you to test immediately
You are pregnant
You need an initial baseline test
A provider may test or treat you immediately and recommend another test later.
Someone can have chlamydia in the throat or rectum even when a urine test is negative. Testing should include the body locations involved in the sexual encounter.
Read the complete KISS guide: Chlamydia: Symptoms, Testing, Treatment and Partner Notification.
Gonorrhea Testing Window Period
Gonorrhea is also commonly diagnosed with a NAAT using urine or a swab.
A practical gonorrhea testing window is approximately two weeks after exposure. Earlier testing may identify some infections, but a negative result obtained too soon may need to be repeated.
The test must match the location exposed:
A urine or genital test checks for genital or urethral gonorrhea
A throat swab checks for throat gonorrhea
A rectal swab checks for rectal gonorrhea
A vaginal or cervical swab checks for vaginal or cervical infection
A urine test does not reliably rule out a separate infection in the throat or rectum. CDC advises people who have had oral or anal sex to discuss throat and rectal testing with a provider.
Read the complete KISS guide: Gonorrhea: Symptoms, Testing, Treatment and Prevention.
Syphilis Testing Window Period
Syphilis is usually diagnosed through blood testing. In some situations, a provider may also test material from a sore.
Syphilis blood tests do not always become positive immediately. Many sexual-health services use approximately six weeks after exposure as a practical initial window.
A provider may recommend another test at approximately three months when:
The initial test was performed early
The exposure was considered higher risk
Symptoms develop
A partner has confirmed syphilis
There is an ongoing possibility of exposure
Do not wait until the end of the window period if you develop a sore, rash or other possible symptoms. A healthcare provider can evaluate you immediately and determine whether treatment or repeat testing is appropriate.
Read the complete KISS guide: Syphilis: Symptoms, Testing, Treatment, Stages and Prevention.
HIV Testing Window Periods
There is no single HIV window period because different HIV tests look for different markers.
HIV Nucleic Acid Test
A nucleic acid test, or NAT, looks for the virus itself in blood.
A NAT can usually detect HIV approximately 10 to 33 days after exposure.
Laboratory Antigen/Antibody Test
A laboratory antigen/antibody test checks for HIV antibodies and the p24 antigen.
When performed using blood from a vein, it can usually detect HIV approximately 18 to 45 days after exposure.
Rapid Finger-Stick Antigen/Antibody Test
A rapid antigen/antibody test performed using finger-stick blood can usually detect HIV approximately 18 to 90 days after exposure.
HIV Antibody Test
Most rapid tests and HIV self-tests are antibody tests. They can usually detect HIV approximately 23 to 90 days after exposure.
When an HIV test is negative following a recent exposure, CDC recommends testing again after the window period for the specific test used.
Do Not Wait to Ask About PEP
PEP may reduce the likelihood of acquiring HIV after a qualifying exposure, but it needs to be started within 72 hours.
Do not wait for an HIV test to reach its final window period before asking about PEP.
Read the KISS guide: HIV: Testing, PrEP, Symptoms and Prevention.
Herpes Testing Window Period
Herpes testing depends heavily on whether symptoms are present.
Testing an Active Sore
When a blister, ulcer or sore is present, a healthcare provider may swab the lesion.
The sore should be evaluated as soon as possible. A lesion swab is most useful before the sore begins healing.
Herpes Blood Testing
A type-specific herpes blood test looks for antibodies to HSV-1 or HSV-2. According to CDC herpes-testing guidance, it can take up to 16 weeks or longer after exposure for current blood tests to detect an infection.
A herpes blood test:
Cannot determine exactly when the infection occurred
Cannot identify which partner transmitted it
May not identify the body location of an HSV-1 infection
Can produce false-positive results
Is not routinely recommended for every person without symptoms
Discuss herpes testing with a healthcare provider, particularly when symptoms are present or a partner has herpes.
Read the complete KISS Herpes Guide. KISS’s existing herpes resource also explains that standard STI panels do not always include HSV testing.
Hepatitis C Testing Window Period
Two major types of hepatitis C tests have different window periods.
Hepatitis C RNA Test
An HCV RNA test looks for genetic material from the virus. HCV RNA can become detectable approximately one to two weeks after exposure.
Hepatitis C Antibody Test
A hepatitis C antibody test looks for the immune system’s response to the virus. Antibodies usually become detectable approximately eight to eleven weeks after exposure.
Someone exposed within the previous six months may need an HCV RNA test instead of relying only on an antibody test.
Read more from the CDC about hepatitis C diagnosis and testing.
Hepatitis B Testing After Exposure
Hepatitis B testing can involve several blood markers, including:
Hepatitis B surface antigen
Hepatitis B surface antibody
Hepatitis B core antibody
The correct tests and timing depend on vaccination history, previous infection and the type of exposure.
Do not wait for follow-up testing after a known hepatitis B exposure. Someone who is unvaccinated or unsure of their vaccination status should contact a healthcare provider promptly.
CDC hepatitis B post-exposure guidance explains when vaccination, testing or hepatitis B immune globulin may be appropriate.
Trichomoniasis Testing After Exposure
Trichomoniasis may be tested using a vaginal swab, urine sample or another laboratory method, depending on the clinic and a person’s anatomy.
Many people with trichomoniasis do not develop symptoms. When symptoms occur, they may appear approximately 5 to 28 days after infection, although they can begin later.
There is no single testing timeline that applies to every person and test. Contact a provider when:
A partner tested positive
You develop discharge, irritation or pain
You are pregnant
You want testing following a possible exposure
Read more from the CDC about trichomoniasis.
Can You Test for HPV After an Exposure?
There is no general test that can determine a person’s overall HPV status following a sexual encounter.
According to CDC information about genital HPV:
There is no approved routine HPV test for the mouth or throat
HPV tests are not used as general STI screening tests for men
HPV testing is used in certain cervical-cancer screening situations
Testing is not normally performed simply because a partner has HPV or genital warts
People with a cervix should follow recommended cervical-cancer screening schedules based on age, health history and previous results.
Read the complete KISS guide: HPV: Types, Symptoms, Cancer Risk, Vaccine and Prevention.
Should You Get Tested Immediately After Sex?
There are situations in which immediate testing is still useful.
An initial appointment may allow a provider to:
Test for infections acquired before the most recent encounter
Establish baseline HIV or hepatitis results
Examine symptoms or sores
Test the correct anatomical locations
Discuss HIV PEP
Provide hepatitis vaccination or post-exposure care
Treat an infection when a partner has already tested positive
Schedule repeat testing
An immediate negative result may not rule out infection from a very recent encounter. The provider may ask you to return after the relevant window period.
What If a Partner Tested Positive?
Do not simply wait several weeks and hope that a later test is negative.
Contact a healthcare provider or sexual-health clinic and tell them:
Which infection the partner reported
When your most recent sexual contact occurred
What type of sexual contact occurred
Which body locations may have been exposed
Whether you have symptoms
Whether you are pregnant
Whether you use PrEP
Whether you have received hepatitis A, hepatitis B or HPV vaccines
Depending on the infection, a provider may recommend immediate testing, treatment or follow-up testing.
KISS provides a private way to send an anonymous STI notification so previous partners know they may need testing or treatment.
Why Testing the Correct Body Site Matters
A standard urine test may not provide a complete STI screening.
Depending on the sexual contact involved, testing may require:
Urine or a urethral sample after genital exposure
A vaginal or cervical swab for vaginal or cervical infection
A throat swab after oral exposure
A rectal swab after receptive anal exposure
A blood test for HIV, syphilis or hepatitis
A lesion swab when sores or blisters are present
Someone can have an infection in one body location and test negative at another.
For example:
A urine test may be negative while throat gonorrhea is present
A genital test may be negative while rectal chlamydia is present
A blood test does not replace a swab for gonorrhea or chlamydia
An HIV test does not automatically include syphilis or hepatitis testing
CDC notes that STI testing can involve blood, urine and swabs from the vagina, throat or rectum.
Ask the clinic exactly which infections and body locations are included in your screening.
What If Your Result Is Negative?
A negative result means that no infection was detected by that test at the time the sample was collected. It does not always mean that every STI has been ruled out.
Consider asking:
Was I tested after the full window period?
Which specific STIs were included?
What type of HIV test did I receive?
Were my throat and rectum tested?
Do I need repeat testing?
Could medication affect my recommended follow-up schedule?
Should my partner also be tested?
If symptoms develop after a negative test, contact a healthcare provider instead of assuming that the previous result rules out every infection.
Testing After STI Treatment Is Different
Testing after treatment is not the same as testing following an initial exposure.
CDC generally recommends retesting approximately three months after treatment for:
Chlamydia
Gonorrhea
Trichomoniasis in sexually active women
The purpose is largely to identify reinfection, which can occur when partners have not been treated or following a new exposure.
Read the CDC guidance about retesting after STI treatment.
Some infections have additional follow-up requirements. For example, throat gonorrhea normally requires a test of cure 7–14 days after treatment, while syphilis follow-up depends on the infection stage and treatment received.
Follow the schedule provided by the healthcare professional who treated you.
How Often Should You Get Routine STI Testing?
Testing after one encounter is different from maintaining a routine testing schedule.
CDC recommends at least annual testing for syphilis, chlamydia and gonorrhea for sexually active gay, bisexual and other men who have sex with men. Testing every three to six months may be appropriate for people with multiple or anonymous partners.
Testing recommendations for other people depend on age, anatomy, pregnancy, sexual practices, partners and individual circumstances.
Read the KISS guide: How Often Should You Get Tested for STDs and STIs?.
How KISS Helps You Stay on Track
Remembering multiple testing windows and follow-up dates can be difficult.
KISS helps users:
Record encounters privately
Keep track of testing dates
Set future STI testing reminders
Record screening information
Access stigma-free sexual-health education
Receive private partner alerts
Notify previous partners anonymously when needed
Testing is not about blame, shame or judging someone’s sex life. It is a normal part of taking care of your health and giving yourself better information.
Download KISS for iPhone or download KISS from Google Play.
Frequently Asked Questions
How soon after sex should I get tested for STIs?
It depends on the infection and test. Chlamydia and gonorrhea testing is commonly recommended around two weeks after exposure. Syphilis testing may begin around six weeks, while HIV testing ranges from approximately 10 to 90 days depending on the test.
Can an STI test be accurate after three days?
Some infections may occasionally be detected early, but three days is inside the window period for many common STI tests. A negative result obtained that soon may need to be repeated.
Should I wait to test if I have symptoms?
No. Contact a healthcare provider when symptoms develop. A provider can examine you, test the appropriate body locations and determine whether additional testing is needed.
Can I have an STI even if my test was negative?
Yes, particularly when the test was performed during the window period, did not include the relevant infection or used a sample from the wrong body location.
When should I get tested for chlamydia and gonorrhea?
Approximately two weeks after exposure is a commonly used practical window. Test sooner when you have symptoms, a partner tested positive or a provider advises immediate testing.
How long after exposure should I test for syphilis?
Many sexual-health services use approximately six weeks for initial testing. Repeat testing may be advised after an early negative result or higher-risk exposure.
When is an HIV test conclusive?
It depends on the test. A laboratory antigen/antibody test using blood from a vein generally has a window of 18–45 days. Antibody tests and many self-tests may require up to 90 days.
Will a standard STI panel include herpes?
Not necessarily. Herpes blood testing is usually ordered separately and is not routinely recommended for everyone without symptoms.
Will a urine test detect every STI?
No. A urine test will not rule out HIV, syphilis, hepatitis, herpes or infections limited to the throat or rectum.
Can I test for HPV after a hookup?
There is no general post-exposure HPV test. HPV testing is primarily used for cervical-cancer screening in specific age and medical groups.
What should I do if a partner tests positive?
Contact a healthcare provider or clinic instead of waiting for the full testing window on your own. You may need immediate testing, treatment or scheduled follow-up.
Should I avoid sex while waiting to test?
A healthcare provider can give advice specific to your exposure. Temporarily avoiding sexual contact or using barriers can reduce the possibility of transmission while results and follow-up testing are pending.
Related KISS Resources
How Often Should You Get Tested for STDs and STIs?
Can You Have an STI or STD Without Symptoms?
Chlamydia: Symptoms, Testing, Treatment and Partner Notification
Gonorrhea: Symptoms, Testing, Treatment and Prevention
Syphilis: Symptoms, Testing, Treatment, Stages and Prevention
HIV: Testing, PrEP, Symptoms and Prevention
Herpes
HPV: Types, Symptoms, Cancer Risk, Vaccine and Prevention
Common STIs and STDs: Symptoms, Testing and Prevention
STI Information and Sexual Health Education
Anonymous STI Notification App
Sexual Health
Find STI Testing Near You
Use the CDC’s confidential tool to find HIV, STI and viral-hepatitis testing and vaccination services near you.
Medical Disclaimer
This page is provided for general educational purposes and does not replace medical advice, diagnosis, testing or treatment.
Testing technology, laboratory procedures and medical recommendations can differ. A healthcare provider may recommend immediate testing, repeat testing or a different schedule based on symptoms, pregnancy, medication use, vaccination history, exposure details and other individual factors.
Seek prompt professional care following a known exposure, when symptoms are present or when HIV or hepatitis post-exposure treatment may be time-sensitive.
Sources and Further Reading
CDC: Getting Tested for STIs
CDC: Getting Tested for HIV
CDC: Clinical Guidance for HIV PEP
CDC: Herpes Testing
CDC: Hepatitis C Diagnosis and Testing
CDC: STI Screening Recommendations
CDC: Retesting After STI Treatment
NHS Inform: STI Testing at Home and Window Periods
WHO: Sexually Transmitted Infections

Frequently Asked Questions

How soon after sex should I get tested for STIs?

It depends on the infection and test. Chlamydia and gonorrhea testing is commonly recommended around two weeks after exposure. Syphilis testing may begin around six weeks, while HIV testing ranges from approximately 10 to 90 days depending on the test.

Can an STI test be accurate after three days?

Some infections may occasionally be detected early, but three days is inside the window period for many common STI tests. A negative result obtained that soon may need to be repeated.

Should I wait to test if I have symptoms?

No. Contact a healthcare provider when symptoms develop. A provider can examine you, test the appropriate body locations and determine whether additional testing is needed.

Can I have an STI even if my test was negative?

Yes, particularly when the test was performed during the window period, did not include the relevant infection or used a sample from the wrong body location.

When should I get tested for chlamydia and gonorrhea?

Approximately two weeks after exposure is a commonly used practical window. Test sooner when you have symptoms, a partner tested positive or a provider advises immediate testing.

How long after exposure should I test for syphilis?

Many sexual-health services use approximately six weeks for initial testing. Repeat testing may be advised after an early negative result or higher-risk exposure.

When is an HIV test conclusive?

It depends on the test. A laboratory antigen/antibody test using blood from a vein generally has a window of 18–45 days. Antibody tests and many self-tests may require up to 90 days.

Will a standard STI panel include herpes?

Not necessarily. Herpes blood testing is usually ordered separately and is not routinely recommended for everyone without symptoms.

Will a urine test detect every STI?

No. A urine test will not rule out HIV, syphilis, hepatitis, herpes or infections limited to the throat or rectum.

Can I test for HPV after a hookup?

There is no general post-exposure HPV test. HPV testing is primarily used for cervical-cancer screening in specific age and medical groups.

What should I do if a partner tests positive?

Contact a healthcare provider or clinic instead of waiting for the full testing window on your own. You may need immediate testing, treatment or scheduled follow-up.

Should I avoid sex while waiting to test?

A healthcare provider can give advice specific to your exposure. Temporarily avoiding sexual contact or using barriers can reduce the possibility of transmission while results and follow-up testing are pending.

Related KISS Resources

Find STI Testing Near You

Use the CDC’s confidential tool to find HIV, STI and viral-hepatitis testing and vaccination services near you.

Medical Disclaimer

This page is provided for general educational purposes and does not replace medical advice, diagnosis, testing or treatment.

Testing technology, laboratory procedures and medical recommendations can differ. A healthcare provider may recommend immediate testing, repeat testing or a different schedule based on symptoms, pregnancy, medication use, vaccination history, exposure details and other individual factors.

Seek prompt professional care following a known exposure, when symptoms are present or when HIV or hepatitis post-exposure treatment may be time-sensitive.