How often you should get tested for STIs depends on your age, sex, and sexual activity, but nearly everyone needs at least some screening. The baseline recommendation is that all people ages 13 to 64 get tested for HIV at least once in their lifetime. Beyond that, annual testing or more frequent screening applies to several groups.
Baseline Testing for All Adults
Even if you feel healthy, a one-time HIV test is recommended for everyone between 13 and 64. Many STIs produce no obvious symptoms, which means infections can spread and cause long-term damage without you ever realizing something is wrong. Chlamydia, for example, frequently causes no symptoms at all, yet untreated infections can lead to infertility and chronic pelvic pain. Routine screening catches these infections early, when they’re simplest to treat.
If you’re sexually active with new or multiple partners, a single lifetime test isn’t enough. Your testing schedule should reflect your current sexual activity, not just your history.
Annual Testing for Women Under 25
All sexually active women younger than 25 should be tested for chlamydia and gonorrhea every year. These two infections are especially common in younger women and often cause no symptoms until they’ve already done damage to the reproductive tract.
Women 25 and older don’t automatically need annual chlamydia and gonorrhea screening, but they should continue yearly testing if they have new partners, multiple partners, or a partner with a known STI. The risk factors, not the birthday, determine whether screening stays on the calendar.
Testing for Men Who Have Sex With Men
Men who have sex with men (MSM) face higher rates of several STIs and need more frequent screening. The minimum recommendation is testing at least once a year for syphilis, chlamydia, gonorrhea, and HIV, regardless of condom use. Chlamydia and gonorrhea testing should cover all sites of contact, including the urethra, rectum, and throat for gonorrhea.
If you have multiple or anonymous partners, that schedule tightens to every 3 to 6 months for all four infections. The same 3-to-6-month frequency applies if you’re living with HIV or taking PrEP.
If You’re on PrEP
Taking PrEP (pre-exposure prophylaxis for HIV prevention) comes with a built-in testing schedule. Before starting PrEP, you’ll be screened for chlamydia, gonorrhea, and syphilis as a baseline.
Once you’re on oral PrEP, the testing cadence depends on your risk profile. MSM and transgender women on PrEP should be screened for bacterial STIs as often as every 3 months, especially if they’ve had a previous STI diagnosis or have multiple partners. All PrEP users should be screened for syphilis and gonorrhea at least every 6 months. Heterosexually active people on PrEP are screened for chlamydia at least once a year.
Injectable PrEP follows a similar pattern, with bacterial STI screening starting at month 3 and repeating every 4 months for MSM and transgender women, or every 6 months for heterosexually active people.
Syphilis Screening
Syphilis rates have been climbing sharply in recent years, and screening is recommended for anyone at increased risk. That includes men who have sex with men, people living with HIV, people with other STIs, and people with a history of incarceration or sex work. The U.S. Preventive Services Task Force gives syphilis screening in at-risk populations its highest recommendation grade.
For people who remain at high risk, screening at least once a year is the floor. Every 3 to 6 months is more appropriate for MSM or people with HIV who continue to have new partners.
HPV and Cervical Cancer Screening
HPV screening follows a different, slower schedule than other STI testing because it’s tied to cervical cancer prevention rather than acute infection management. The first Pap test is recommended at age 21, with repeat Pap tests every 3 years through age 29.
Starting at 30, you have a few options: an HPV test alone every 5 years, an HPV/Pap combination test every 5 years, or a Pap test every 3 years. The American Cancer Society recommends starting HPV testing at 25 instead of 21, with testing every 5 years through age 65. After 65, most people with a history of normal results can stop screening entirely.
More frequent cervical screening may be needed if you’re HIV-positive, have a weakened immune system, or have had abnormal results in the past.
Window Periods to Know
Getting tested too soon after exposure can produce a false negative. Every infection has a “window period,” the time between exposure and when a test can reliably detect it.
- Chlamydia: A urine or swab test picks up most infections within 1 week and catches nearly all of them by 2 weeks after exposure.
- HIV (blood test): An antigen/antibody blood test detects most infections within 2 weeks and nearly all by 6 weeks. An oral swab test takes longer, catching most by 1 month and nearly all by 3 months.
- Syphilis: A blood test picks up most infections at 1 month, but it can take up to 3 months to catch nearly all cases.
If you’ve had a specific exposure you’re worried about, testing at the 2-week mark can catch some infections early, but a follow-up test after the full window period gives you a more reliable answer.
After a New Partner or Possible Exposure
Outside of routine schedules, certain situations call for testing on their own. You should get tested if you have a new sexual partner, if a current partner tells you they’ve been diagnosed with an STI, if you’ve had unprotected sex with someone whose status you don’t know, or if you notice any symptoms like unusual discharge, sores, or pain during urination.
Even in a long-term relationship, testing makes sense if either partner has had other sexual contact. Many people carry infections without symptoms for months or even years, so a clean bill of health from one test doesn’t cover you indefinitely if your circumstances change. Building STI screening into your regular health routine, rather than treating it as something you only do when something feels wrong, is the most reliable way to stay on top of your sexual health.