Most people with chlamydia don’t know they have it. About 75% of women and 50% of men with the infection have zero symptoms, which is why chlamydia is often called a “silent” infection. The only reliable way to know for sure is to get tested, but there are signs that can tip you off if symptoms do show up.
Symptoms in Women
When chlamydia does cause symptoms in women, they tend to be subtle enough to dismiss as something else. The most common signs include abnormal vaginal discharge, a burning feeling when you pee, and bleeding between periods. Some women also notice an unusual smell with the discharge.
If the infection has been present for weeks or months without treatment, it can spread deeper into the reproductive tract and cause pelvic or lower abdominal pain. At that point, the infection may have already progressed to pelvic inflammatory disease, a more serious complication covered below.
Symptoms in Men
Men who do get symptoms typically notice discharge from the penis and a burning sensation during urination. Less commonly, one or both testicles may become painful and swollen. These symptoms can be mild enough that some men ignore them or assume they’ll go away on their own.
Symptoms at Other Body Sites
Chlamydia doesn’t only infect the genitals. It can also show up in the rectum or throat depending on the type of sexual contact involved. Rectal chlamydia may cause pain, discharge, or bleeding from the rectum, though it’s often completely silent. Throat infections from oral sex rarely produce noticeable symptoms, which makes them easy to miss without specific testing at that site.
When Symptoms Appear
If you’re going to develop symptoms at all, they typically show up within one to three weeks after exposure. But plenty of people carry chlamydia for months without ever noticing anything wrong. The absence of symptoms doesn’t mean the infection is harmless. It can still be passed to partners and still cause damage over time.
How Testing Works
The standard test for chlamydia is a nucleic acid amplification test, which detects the bacteria’s genetic material. It’s extremely accurate and can be done with a urine sample or a swab. For women, a vaginal swab is the preferred method because it catches 5% to 10% more infections than a urine test. For men, a urine sample works well. If you’ve had oral or anal sex, your provider may swab your throat or rectum separately, since a urine test won’t detect infections at those sites.
Timing matters. If you were recently exposed, testing too early can give a false negative. Waiting at least one week after exposure catches most infections, and waiting two weeks catches nearly all of them.
Who Should Get Screened Routinely
Because chlamydia so often flies under the radar, routine screening is recommended even when you feel fine. The CDC recommends annual screening for all sexually active women under 25. Women 25 and older should be screened annually if they have risk factors like a new partner, multiple partners, a partner who has other partners, inconsistent condom use outside a monogamous relationship, or a previous STI.
For men who have sex with men, annual screening is recommended regardless of condom use, with testing at every site of sexual contact (urethra, rectum). Men who are on PrEP, have HIV, or have multiple partners should be screened every three to six months. For heterosexual men at low risk, routine screening isn’t strongly recommended, though it may be offered in high-prevalence settings like STI clinics or correctional facilities.
Transgender and gender-diverse individuals should follow screening guidelines based on their anatomy. Anyone with a cervix who is under 25 and sexually active should be screened annually, for example, regardless of gender identity.
What Happens If It Goes Untreated
Left alone, chlamydia doesn’t just sit quietly. In women, about 10% to 15% of untreated infections lead to pelvic inflammatory disease. PID can cause chronic pelvic pain and permanent damage to the fallopian tubes and uterus, which can result in infertility or increase the risk of ectopic pregnancy. The tricky part is that this damage can happen even without noticeable symptoms along the way.
In men, untreated chlamydia can lead to infection in the tube that carries sperm from the testicle, causing pain and, in rare cases, affecting fertility. For both men and women, having chlamydia also makes it easier to contract or transmit HIV if exposed.
Treatment Is Simple
The good news is that chlamydia is easily cured with a short course of antibiotics. Most people take pills for one to seven days depending on the regimen. You should avoid sex until you and your partner have both finished treatment. Retesting about three months after treatment is recommended, since reinfection is common, particularly if a partner wasn’t treated at the same time.
If you’re wondering whether you might have chlamydia, the bottom line is straightforward: symptoms alone won’t give you a reliable answer. Testing is quick, widely available at clinics and through at-home kits, and it’s the only way to know for certain.