Most people with chlamydia don’t know they have it. Around 75% of women and 50% of men with the infection experience no symptoms at all, which is why it’s the most commonly reported bacterial sexually transmitted infection in the United States. If you’re wondering whether you might have chlamydia, the honest answer is that symptoms alone can’t reliably tell you. Testing is the only way to know for sure.
Symptoms You Might Notice
When chlamydia does cause symptoms, they typically show up one to three weeks after exposure. What you feel depends on where the infection is and your anatomy.
In women and people with vaginas, the most common signs are a burning sensation when you pee and unusual vaginal discharge that may look yellow or green and smell different than normal. You might also notice bleeding between periods, spotting after sex, or a dull ache in your lower belly or pelvis. Pain deep in the pelvis during sex is another signal. These symptoms overlap with many other conditions, so they’re easy to dismiss or chalk up to something else.
In men and people with penises, the most recognizable symptoms are discharge from the penis (often clear or whitish) and a burning or stinging feeling during urination. Some people also experience pain or swelling in one or both testicles, though that’s less common.
Chlamydia can also infect the rectum and throat. Rectal infections may cause discharge, pain, or bleeding, while throat infections rarely produce noticeable symptoms at all. These infections won’t show up on a standard urine test, so if you’ve had oral or anal sex, you need to mention that when getting tested.
Why You Can’t Rely on Symptoms
The three-out-of-four figure for symptomless women isn’t a rough estimate. It means the vast majority of people walking around with chlamydia feel perfectly fine. The infection can sit quietly for weeks, months, or even longer without announcing itself. During that entire time, you can pass it to sexual partners.
Left untreated, chlamydia can cause serious problems. In women, the bacteria can spread to the uterus and fallopian tubes, leading to pelvic inflammatory disease. That condition brings pain, fever, and can cause lasting damage that affects fertility. In men, untreated chlamydia can inflame the tube that carries sperm, causing pain and, in rare cases, affecting the ability to have children. These complications develop silently, which is why routine screening matters even when you feel healthy.
How Testing Works
Chlamydia testing is simple and highly accurate. The standard test uses a technology that detects the bacteria’s genetic material, with sensitivity above 90% and specificity above 99%. In practical terms, that means false negatives are uncommon and false positives are extremely rare.
For genital infections, the test usually involves either a urine sample or a vaginal swab. A vaginal swab is slightly more accurate for women, and you can often do it yourself in the clinic. For men, a urine sample is the standard. If you’ve had receptive anal or oral sex, a separate swab of the throat or rectum is necessary because a urine test won’t detect infections at those sites.
Timing matters. If you think you were exposed, waiting at least one week gives the test the best chance of catching the infection. Two weeks after exposure catches nearly all cases. Testing too early can produce a false negative because the bacterial load hasn’t built up enough to detect.
At-Home Testing Options
The FDA has authorized the first fully at-home test for chlamydia, gonorrhea, and trichomoniasis: the Visby Medical Women’s Sexual Health Test. It uses a vaginal swab and can be purchased without a prescription. In clinical studies, it correctly identified 97.2% of positive chlamydia samples and 98.8% of negative ones. That’s comparable to many clinic-based tests.
This particular test is designed for vaginal swabs, so it’s currently an option for women and people with vaginas. Several mail-in test kits also exist where you collect a sample at home and send it to a lab, though turnaround time for results varies from a few days to about a week. For rectal or throat testing, you’ll still need a clinic visit in most cases.
What Happens After a Positive Test
Chlamydia is curable with a short course of antibiotics, typically a seven-day oral regimen. Most people finish treatment without any side effects beyond mild stomach upset. You should avoid sex during the full course of treatment to prevent passing the infection.
Anyone you’ve had sex with in the past 60 days needs to know so they can get tested and treated too. This prevents reinfection, which is one of the most common complications. Getting reinfected increases the cumulative risk of damage to reproductive organs.
After treatment, you should get retested three months later. This isn’t to check whether the antibiotics worked (they almost always do) but to catch reinfection, which happens more often than most people expect. If you test positive again at that three-month mark, you’ll need another round of treatment.
Who Should Get Tested Routinely
Because symptoms are so unreliable, the CDC recommends annual chlamydia screening for all sexually active women under 25. Women 25 and older should be tested annually if they have new or multiple sexual partners. Men who have sex with men should be screened at least once a year at all sites of contact (genital, rectal, throat). There’s no universal screening recommendation for heterosexual men, but testing makes sense after unprotected sex with a new partner or if a partner tests positive.
If you’re pregnant, you should be tested during your first prenatal visit regardless of age or risk factors. Untreated chlamydia during pregnancy can be passed to the baby during delivery, potentially causing eye infections or pneumonia in the newborn.