Most STD symptoms appear within a few days to a few weeks after exposure, but the exact timeline varies widely depending on the infection. Some show up in under a week, others take months, and many never cause noticeable symptoms at all. Here’s what to expect for each major STD.
Chlamydia: 1 to 3 Weeks
Chlamydia symptoms typically appear 1 to 3 weeks after exposure. But here’s the catch: an estimated 77% of all chlamydia infections never produce symptoms. That means the vast majority of people who have it don’t know unless they get tested. When symptoms do show up, they usually involve painful urination and unusual discharge.
Gonorrhea: 2 Days to 2 Weeks
Gonorrhea tends to move faster, with symptoms usually appearing within 2 to 8 days, though it can take up to 2 weeks. Men are more likely to notice something, typically a burning sensation while urinating and a white, yellow, or green discharge from the penis. Women often get no symptoms at all, or symptoms mild enough to be mistaken for a bladder or vaginal infection. Roughly 45% of all gonorrhea cases never become symptomatic.
Syphilis: 10 to 90 Days
Syphilis has one of the widest incubation windows. A painless sore called a chancre appears at the site of infection anywhere from 10 to 90 days after exposure, with 21 days being the average. That sore lasts 3 to 6 weeks and heals on its own whether or not you get treated.
Healing doesn’t mean the infection is gone. If untreated, syphilis progresses to a secondary stage, which brings a body rash that can appear while the original sore is still healing or several weeks after it’s gone. Because the initial sore is painless and sometimes hidden (inside the mouth, vagina, or rectum), many people miss it entirely.
Genital Herpes: 2 to 10 Days
The first herpes outbreak usually starts about 2 to 10 days after the virus enters the body. Unlike later outbreaks, which tend to be shorter and milder, the initial episode is often the worst. Expect painful blisters or sores around the genitals or rectum, sometimes accompanied by flu-like symptoms like fever and body aches. This first outbreak can last 2 to 4 weeks before the sores heal.
After the initial episode, the virus stays in your body permanently. Some people have frequent recurrences, others have rare ones, and some never have another visible outbreak despite still carrying the virus.
HPV and Genital Warts: 1 to 6 Months
Genital warts caused by HPV appear after an incubation period of 1 to 6 months. Many strains of HPV never cause warts at all. The strains that cause cancer (which are different from the ones that cause warts) can remain completely silent for years or even decades. There’s no reliable way to know when you were exposed based on when symptoms appear, which is one reason HPV is so widespread.
HIV: 2 to 4 Weeks
Acute HIV infection, the earliest stage, generally develops within 2 to 4 weeks after infection. Symptoms at this stage resemble a bad flu: fever, sore throat, swollen lymph nodes, rash, muscle aches, and fatigue. These symptoms are easy to dismiss or attribute to something else, and they resolve on their own. After that, HIV can remain silent for years while gradually damaging the immune system.
If you think you’ve been exposed, timing matters for testing. A lab-based blood draw from a vein can usually detect HIV 18 to 45 days after exposure. A rapid finger-stick test has a wider window of 18 to 90 days. If you have symptoms and test negative early on, a nucleic acid test can detect the virus sooner than other options.
Trichomoniasis: 5 to 28 Days
Trichomoniasis symptoms can appear 5 to 28 days after infection, though some people don’t develop them until much later. About 70% of infected people have no signs or symptoms at all. When symptoms do appear, they usually involve itching, burning, redness around the genitals, and unusual discharge that may have a strong odor.
Hepatitis B: 2 to 5 Months
Hepatitis B has one of the longest incubation periods of any STD. Symptoms appear an average of 90 days after exposure but can range from 60 to 150 days. Early signs include fatigue, nausea, loss of appetite, abdominal pain, and jaundice (yellowing of the skin and eyes). Many adults clear the virus on their own, but some develop a chronic infection.
Why Symptoms Alone Aren’t Reliable
The biggest takeaway from these timelines is that waiting for symptoms is not a dependable strategy. The majority of chlamydia and gonorrhea cases, the two most common bacterial STDs, never produce noticeable symptoms. Syphilis sores can be hidden. HIV’s initial flu-like phase is easily overlooked. HPV can lurk for months or years.
The reason most bacterial STDs go untreated isn’t that people ignore symptoms. It’s that they never have symptoms to ignore. Testing is the only way to know your status with any certainty, especially after a new partner or unprotected sex. Most standard STD panels can give accurate results within 2 to 4 weeks of exposure, though the specific timing depends on the infection and the type of test used.