Most STDs take anywhere from a few days to a few months to show up, depending on the infection. The tricky part is that many never produce noticeable symptoms at all, which means testing on a timeline is often more reliable than waiting to feel something. Here’s what to expect for each major STD, both in terms of symptoms and test accuracy.
Why “Showing Up” Means Two Different Things
When people search this question, they usually mean one of two things: how long until symptoms appear, or how long until a test can detect the infection. These are not the same timeline. Symptoms can show up days or weeks after exposure, but many STDs are silent in a large percentage of people. Roughly 60% of chlamydia infections, 53% of gonorrhea infections, and 57% of trichomoniasis infections produce no symptoms at all. That means you can be infected and feel completely fine for months or even years.
Testing windows matter because every test needs a minimum amount of time after exposure before it can reliably detect the infection. Getting tested too early can produce a false negative, giving you a clean result when you’re actually infected.
Chlamydia: 5 to 14 Days
Symptoms of chlamydia typically start 5 to 14 days after exposure. You might notice unusual discharge, burning during urination, or pelvic discomfort. But since the majority of infections are asymptomatic, especially in women, many people carry chlamydia without ever knowing. A urine test or swab can detect chlamydia about two weeks after exposure, making that a reasonable time to get tested if you’re concerned.
Gonorrhea: 5 to 10 Days
Gonorrhea tends to show up a bit faster in men, with symptoms often starting within five days of exposure. In women, symptoms of a genital tract infection usually appear within 10 days. Common signs include painful urination, discharge, and in women, bleeding between periods. Like chlamydia, gonorrhea is frequently silent, so testing around two weeks after exposure is a better strategy than waiting for symptoms.
Syphilis: 10 to 90 Days
Syphilis has one of the widest incubation windows. The first sign is a painless sore called a chancre, which appears at the site of infection anywhere from 10 to 90 days after contact. Because the sore is painless and sometimes hidden (inside the mouth, vagina, or rectum), it’s easy to miss entirely. If untreated, syphilis progresses through stages that can affect the heart and nervous system years later. Blood tests can typically detect syphilis about 3 to 6 weeks after exposure.
Genital Herpes: 2 to 10 Days
A first herpes outbreak usually appears 2 to 10 days after the virus enters the body. The initial episode is often the worst, lasting 2 to 4 weeks, and can include painful blisters or sores around the genitals or mouth, along with flu-like symptoms. Some people feel pain in the lower back, buttocks, or thighs a few hours before sores appear.
Herpes is unusual in that many people have mild or unrecognized first outbreaks, then discover the infection months or years later during a recurrence or a blood test. A swab test works best when active sores are present. Blood tests that look for antibodies generally need about 12 weeks after exposure to be accurate.
HPV and Genital Warts: 1 to 6 Months
Visible genital warts from HPV typically appear 1 to 6 months after infection. However, many HPV strains cause no warts at all and instead raise the risk of cervical or other cancers over years or decades. Most HPV infections clear on their own within one to two years without ever causing symptoms. There is no routine HPV test for men, and cervical screening (Pap tests) for women detects HPV-related cell changes rather than the virus directly.
Trichomoniasis: 5 to 28 Days
Trichomoniasis symptoms usually develop 5 to 28 days after infection, though some people don’t notice anything until much later. Women are more likely to have symptoms than men, and common signs include frothy or foul-smelling discharge, itching, and discomfort during urination or sex. It’s easily treated once detected, and testing is reliable about two weeks after exposure.
HIV: 10 to 90 Days for Testing
HIV deserves special attention because the testing window varies significantly by test type. Some people experience flu-like symptoms (fever, fatigue, swollen lymph nodes, rash) 2 to 4 weeks after infection, but these are easy to mistake for a common illness.
For testing accuracy, here’s how the timelines break down by test type:
- Nucleic acid test (NAT): detects HIV 10 to 33 days after exposure. This is the earliest and most sensitive option, but it’s not widely used for routine screening.
- Lab-based antigen/antibody test (blood draw from a vein): reliable 18 to 45 days after exposure. This is the standard test at most clinics.
- Rapid antigen/antibody test (finger stick): accurate 18 to 90 days after exposure.
- Rapid antibody test or home self-test: reliable 23 to 90 days after exposure.
If you’re using a home test or rapid antibody test after a specific exposure, testing at the three-month mark gives you the most reliable result.
Hepatitis B and C: Weeks to Months
Hepatitis B symptoms can appear anywhere from 1 to 5 months after infection. Hepatitis C has an even wider range, from about 2 weeks to 6 months. Both infections can cause fatigue, nausea, abdominal pain, dark urine, and jaundice (yellowing of the skin or eyes). But many people with hepatitis C, in particular, have no symptoms during the acute phase and only discover the infection through blood work years later, sometimes after liver damage has already begun.
Mycoplasma Genitalium: 2 to 35 Days
This lesser-known STD is gaining attention as a common cause of urethritis and cervicitis. Symptoms typically develop 2 to 35 days after infection and can resemble chlamydia: discharge, burning during urination, and pelvic pain. Testing is not yet part of standard STD panels at all clinics, so if you have persistent symptoms after testing negative for chlamydia and gonorrhea, it’s worth asking specifically about this one.
When to Get Tested After Exposure
Because so many STDs can be silent, testing on a schedule matters more than waiting for symptoms. As a general guide, most bacterial infections (chlamydia, gonorrhea, syphilis) are detectable within 2 to 6 weeks of exposure. Viral infections like HIV and hepatitis may need longer, up to 3 months for the most common test types to be fully reliable. If you test early and get a negative result but the exposure was recent, retesting at the 3-month mark covers most remaining window periods.
Getting tested once at the two-week mark and again at three months after a known exposure gives you the most complete picture across all major STDs.