Most STDs take anywhere from a few days to a few months to show up, depending on the infection. Some appear within a week, others can hide for months or even years before causing noticeable symptoms. Making this more complicated, many STDs never produce obvious symptoms at all, which means testing is the only reliable way to know your status.
Here’s a breakdown of specific timelines for the most common STDs, along with what to know about testing windows and asymptomatic infections.
Chlamydia: 5 to 14 Days
Chlamydia symptoms typically start 5 to 14 days after exposure. You might notice unusual discharge, burning during urination, or pelvic discomfort. But here’s the catch: chlamydia is one of the most commonly silent infections. Only about 11% to 33% of infected men and 6% to 17% of infected women ever develop noticeable symptoms. That means the vast majority of people carrying chlamydia have no idea unless they get tested.
Standard testing with a urine sample or swab is accurate within about two weeks of exposure. If you test too early, the infection may not be detectable yet.
Gonorrhea: 5 to 10 Days
Gonorrhea tends to show up a bit faster in men, often within five days, with symptoms like painful urination and discharge. In women, symptoms of genital infection generally appear within 10 days of exposure but are far less likely to be obvious. Roughly 45% to 85% of men with gonorrhea develop symptoms, compared to only 14% to 35% of women.
This gap matters. Women are more likely to have gonorrhea without knowing it, which increases the risk of complications like pelvic inflammatory disease if it goes untreated. Testing is reliable about two weeks after exposure.
Herpes: 2 to 10 Days
A first herpes outbreak typically appears 2 to 10 days after the virus enters the body. The initial episode is usually the most painful and can include clusters of blisters or sores, flu-like symptoms, and swollen lymph nodes. Subsequent outbreaks, if they occur, tend to be milder and shorter.
That said, herpes is frequently silent. In one study tracking people newly infected with HSV-2 (the type most associated with genital herpes), only 37% developed recognizable symptoms. Many people shed the virus and can transmit it without ever having a visible sore. Blood tests for herpes antibodies generally need at least 12 weeks after exposure to be accurate, since the body takes time to produce detectable antibody levels.
Syphilis: 3 to 6 Weeks
Syphilis has a longer incubation period. The first sign is usually a single, painless sore called a chancre at the site of infection. This sore typically appears about three weeks after exposure, though it can take up to 90 days. The sore lasts 3 to 6 weeks and heals on its own whether or not you receive treatment.
That self-healing is deceptive. The infection doesn’t go away; it progresses to a secondary stage that can include rashes, fever, and swollen glands. Because the initial sore is painless and sometimes hidden (inside the mouth, rectum, or vagina), it’s easy to miss entirely. Blood testing can detect syphilis antibodies roughly 3 to 6 weeks after exposure.
HIV: 2 to 4 Weeks for Symptoms, Longer for Testing
Some people experience flu-like symptoms 2 to 4 weeks after contracting HIV, including fever, fatigue, sore throat, and swollen glands. This is called acute HIV infection, and the symptoms often feel indistinguishable from a regular illness. Many people don’t connect these symptoms to a possible exposure.
Testing timelines depend on the type of test:
- Nucleic acid test (NAT): Can detect HIV 10 to 33 days after exposure. This test looks for the virus itself in your blood.
- Lab antigen/antibody test (blood draw from a vein): Reliable 18 to 45 days after exposure.
- Rapid antigen/antibody test (finger stick): Accurate 18 to 90 days after exposure.
- Antibody-only tests: Detect infection 23 to 90 days after exposure.
If you test negative but it’s been less than 90 days since a potential exposure, a follow-up test at the 90-day mark gives you a definitive answer.
HPV: Weeks to Years
HPV is uniquely unpredictable. Genital warts from low-risk HPV strains can appear weeks, months, or even years after infection. High-risk strains that can lead to cervical or other cancers rarely produce visible symptoms at all and are typically detected only through routine screening like a Pap smear or HPV test.
There’s no standard HPV test for men, and no blood test for the virus. Most sexually active people will contract at least one strain of HPV in their lifetime, and the body’s immune system clears most infections within one to two years without treatment.
Hepatitis B: 2 to 5 Months
Hepatitis B has one of the longest incubation periods of any STD. Symptoms generally appear about 90 days after exposure, with a range of 60 to 150 days. Early symptoms can include fatigue, nausea, abdominal pain, dark urine, and jaundice (yellowing of the skin and eyes). Some people, particularly adults, clear the infection on their own, while others develop a chronic infection that requires ongoing monitoring or treatment.
Blood tests can typically detect hepatitis B surface antigens within 4 to 10 weeks of exposure.
Trichomoniasis: 5 to 28 Days
Trichomoniasis, caused by a parasite rather than a virus or bacterium, produces symptoms within 5 to 28 days in those who notice anything at all. Symptoms often include itching, burning, unusual discharge, or discomfort during urination. About 70% of people with trichomoniasis have no signs or symptoms, making routine screening important if you’re at risk.
Why Many STDs Never “Show Up” at All
The biggest misconception about STD timelines is the assumption that you’ll know when something is wrong. For most common STDs, the odds of having zero symptoms are significant. Chlamydia is silent in the majority of cases. Gonorrhea is silent in most women. Herpes goes unnoticed in roughly two-thirds of newly infected people. Trichomoniasis produces no symptoms 70% of the time.
This is why waiting for symptoms is not a reliable strategy. If you’ve had unprotected sex or a condom failure with a new or untested partner, testing is the only way to know for sure. Most STDs are easily treatable when caught early, and even the ones that can’t be cured (like herpes or HIV) are far more manageable with early detection.
When Testing Is Most Accurate
Every STD has a “window period,” the gap between exposure and when a test can reliably detect the infection. Testing too soon can produce a false negative. Here’s a general guide for minimum wait times:
- Chlamydia and gonorrhea: 2 weeks after exposure
- Syphilis: 3 to 6 weeks
- HIV: 10 days (NAT) to 90 days (antibody test) depending on test type
- Herpes (blood test): 12 weeks
- Hepatitis B: 4 to 10 weeks
- Trichomoniasis: 1 to 2 weeks
If you had a specific known exposure and your initial test comes back negative, retesting after the full window period has passed gives you the most reliable result.