Most people with chlamydia don’t know they have it. About 75% of infected women and 50% of infected men never develop noticeable symptoms, which is why testing is the only reliable way to know for sure. Still, your body sometimes does send signals, and knowing what to look for can help you act faster.
Why Symptoms Alone Won’t Tell You
Chlamydia is often called a “silent” infection because the majority of cases produce no symptoms at all. You can carry the bacteria for weeks, months, or even longer without feeling anything unusual. This makes it easy to unknowingly pass the infection to a partner or to let it progress to more serious problems. If you’ve had unprotected sex or a new partner, the absence of symptoms doesn’t mean you’re in the clear.
Symptoms in Women
When chlamydia does cause symptoms in women, they tend to be mild enough to dismiss or mistake for something else. The most common signs include:
- Unusual vaginal discharge: often yellow or green with an unfamiliar odor
- Burning or stinging when you pee
- Bleeding between periods or after sex
- Pain or a dull ache in the lower abdomen or pelvis
- Pain during sex, sometimes felt deep in the pelvis
These symptoms overlap with urinary tract infections, yeast infections, and bacterial vaginosis, which is part of what makes chlamydia easy to misidentify without a test. If you notice any combination of these, particularly after a new sexual contact, testing is the fastest way to get a clear answer.
Symptoms in Men
Men are somewhat more likely to notice symptoms than women, but half still won’t. When signs do appear, they typically include a discharge from the penis (often cloudy or watery), burning during urination, and itching or tingling at the opening of the urethra. Some men develop pain, tenderness, or swelling in one testicle, which can signal that the infection has spread to the tissue around the testicle.
Older medical guidelines treated discharge as the hallmark of infection in men, but more recent evidence shows that many men with chlamydia experience only mild itching or discomfort when urinating, with no visible discharge at all.
Rectal and Throat Infections
Chlamydia doesn’t only affect the genitals. It can infect the rectum (through receptive anal sex or, in women, by spreading from the vaginal area) and the throat (through oral sex). Rectal chlamydia may cause discharge, pain, or bleeding, but it often causes nothing. Throat infections are almost always symptom-free. Standard urine tests won’t detect infections at these sites, so if you’ve had oral or anal sex, let your provider know so they can swab the right areas.
How Long to Wait Before Testing
Chlamydia won’t show up on a test the day after exposure. The bacteria need time to multiply to detectable levels. Testing at one week after a possible exposure catches most infections. Waiting two weeks catches nearly all of them. If you test too early, you risk a false negative, meaning the test says you’re clear when you’re actually infected.
If you’re experiencing symptoms, get tested regardless of timing. Symptoms themselves suggest the infection has already had enough time to establish, so the test is likely to be accurate.
What Testing Looks Like
The standard chlamydia test uses a technology called nucleic acid amplification, which detects the bacteria’s genetic material. For men, this is typically a urine sample. For women, a vaginal swab is preferred over urine because it’s 5% to more than 10% more sensitive. In many clinics, you can collect the vaginal swab yourself rather than having a provider do it.
In 2025, the FDA authorized the first at-home chlamydia test that can be purchased without a prescription, the Visby Medical Women’s Sexual Health Test. It uses a self-collected vaginal swab and also tests for gonorrhea and trichomoniasis. In clinical studies, it correctly identified 97.2% of positive chlamydia samples and 98.8% of negative ones. That’s high accuracy, though not perfect. A negative result on a home test when you have symptoms or a known exposure is worth confirming with a clinic-based test.
Who Should Get Screened Routinely
Because so many infections are silent, major health organizations recommend routine screening even without symptoms. The U.S. Preventive Services Task Force recommends annual chlamydia screening for all sexually active women age 24 and younger. Women 25 and older should be screened if they have risk factors like a new partner, more than one partner, a partner who has other partners, inconsistent condom use outside a monogamous relationship, a previous STI, or a partner with a known STI.
For men, there isn’t a universal screening recommendation. The evidence on population-wide screening benefits is still considered insufficient. That said, men who have sex with men, men with new or multiple partners, and anyone with symptoms should absolutely get tested.
What Happens If It Goes Untreated
Chlamydia is easy to treat once detected, typically clearing with a short course of antibiotics. Left untreated, though, it can cause real damage. In women, about 10 to 15% of untreated chlamydia infections lead to pelvic inflammatory disease, a condition where the infection spreads to the uterus and fallopian tubes. PID can cause chronic pelvic pain, scarring in the reproductive tract, and infertility. In men, untreated chlamydia can lead to painful inflammation of the testicle or the tube behind it, which in rare cases also affects fertility.
The fact that most infections are symptom-free makes this risk particularly important. Damage can accumulate quietly over time, which is why screening matters even when you feel fine.
Retesting After Treatment
Finishing your antibiotics doesn’t mean you’re done. The CDC recommends retesting three months after treatment, not to check whether the medication worked (it almost always does), but to catch reinfection. Repeat infections are common, especially if a partner wasn’t treated at the same time or if you’ve had a new exposure. Getting tested again at the three-month mark is one of the simplest things you can do to protect your long-term health.