Most people with chlamydia don’t know they have it. About 75% of women and 50% of men with chlamydia experience no symptoms at all, which is why testing is the only reliable way to know for sure. When symptoms do appear, they typically show up one to three weeks after exposure, though they can take even longer.
Symptoms in Women
When chlamydia does cause symptoms in women, the most common sign is an unusual vaginal discharge. This discharge may appear white, yellow, or gray and can have an unpleasant smell, though not always. You might also notice a dull ache or pain in your lower abdomen, bleeding between periods, or periods that are more painful than usual.
Pain or burning during urination is another common symptom. Some women also experience pain during sex. These symptoms can be mild enough to brush off as something else, like a urinary tract infection or a yeast infection, which is part of why chlamydia so often goes undiagnosed.
Symptoms in Men
Men are somewhat more likely to notice symptoms than women, but half still won’t. The telltale signs include a clear or cloudy discharge from the penis, burning or itching at the opening of the urethra, and pain or burning when urinating. Some men develop pain or swelling in one or both testicles, though this is less common.
Like in women, these symptoms can easily be mistaken for a urinary tract infection or dismissed as minor irritation.
Symptoms Beyond the Genitals
Chlamydia can also infect the rectum and throat. Rectal chlamydia, which can result from anal sex, may cause rectal pain, discharge, or bleeding, though it’s frequently silent. Throat infections from oral sex rarely cause noticeable symptoms. If you’ve had oral or anal sex with a new or untested partner, genital testing alone won’t catch infections at those other sites.
Why You Can’t Rely on Symptoms Alone
The biggest challenge with chlamydia is that the absence of symptoms means nothing. You can carry and transmit the infection for months or even years without knowing. This is why routine screening matters, especially if you’re sexually active with new partners, under 25, or have had unprotected sex.
Left untreated, chlamydia can cause serious problems. In women, about 10 to 15% of untreated infections lead to pelvic inflammatory disease, a condition that can permanently damage the fallopian tubes and surrounding tissues. This damage can cause chronic pelvic pain, ectopic pregnancy, or infertility. Chlamydia can also silently infect the upper reproductive tract without any obvious symptoms, causing the same kind of damage. In men, untreated chlamydia can lead to infection of the tube that carries sperm, which can also affect fertility.
How Testing Works
Chlamydia testing is simple, fast, and painless in most cases. The standard test looks for the bacteria’s genetic material in a body fluid sample. You’ll either provide a urine sample or have a swab taken from the potentially infected area (vagina, urethra, rectum, or throat). For urine tests, you’ll need to collect from the very first part of your stream, and you should avoid urinating for about two hours beforehand for the most accurate result.
In many cases, you can swab yourself rather than having a provider do it. Some clinics and providers offer this option to make the process more comfortable.
Where to Get Tested
You have several options. Your primary care doctor, a sexual health clinic, or your local health department can all test you. Planned Parenthood and similar organizations offer low-cost or free testing in many areas.
At-home test kits are also available online and at pharmacies. The FDA has approved a home test for chlamydia, gonorrhea, and trichomoniasis in women, and experts generally consider home chlamydia tests reliable because the sample still gets processed in a lab. You collect the sample yourself and mail it in, then receive results digitally. That said, if you’re already experiencing symptoms like unusual discharge, burning, or pain, it’s better to see a provider in person. A physical exam can speed up diagnosis and get you started on treatment the same day rather than waiting for mail-in results.
What Happens If You Test Positive
Chlamydia is curable with antibiotics. Treatment is straightforward and typically clears the infection within a week. You’ll need to avoid sex during treatment and notify recent sexual partners so they can get tested and treated too. Reinfection is common if a partner goes untreated, so this step matters.
Most providers recommend retesting about three months after treatment to make sure you haven’t been reinfected. If you tested positive once, regular screening going forward is a good idea since having chlamydia once doesn’t protect you from getting it again.