Most men with chlamydia have no symptoms at all. Studies estimate that somewhere between 74% and 95% of men with urogenital chlamydia infections never notice anything wrong, which makes waiting for obvious signs an unreliable strategy. The only way to know for sure is to get tested, but there are some signals your body may give you.
Symptoms That Do Show Up
When chlamydia does cause noticeable symptoms in men, they typically center on two things: unusual discharge from the penis and pain or burning during urination. The discharge is often watery or slightly cloudy and tends to be lighter than what you’d see with gonorrhea. Some men describe it as a small amount of fluid they notice on their underwear, especially in the morning.
The burning sensation during urination can range from mild irritation to sharp discomfort. You might also notice redness or swelling at the tip of the penis, or a general feeling of itching around the urethra. These symptoms overlap heavily with other STIs, so even if they match your experience, testing is the only way to confirm what’s causing them.
Rectal and Throat Infections
Chlamydia doesn’t only infect the urethra. Men who have receptive anal sex can develop a rectal infection, which may cause rectal pain, unusual discharge, or bleeding. These infections often produce no symptoms either, so risk-based testing matters here too. Chlamydia can also infect the throat through oral sex, though throat infections rarely cause noticeable symptoms and are less commonly tested for in routine screening.
How Long Before Symptoms Appear
If you were recently exposed and are watching for signs, symptoms typically appear within one to three weeks. But given that the vast majority of infections stay silent, not developing symptoms after three weeks doesn’t mean you’re in the clear. Many men carry chlamydia for months without knowing it, passing it to partners during that time.
Getting Tested
Chlamydia testing for men is straightforward. The standard test is a nucleic acid amplification test (NAAT) performed on either a urine sample or a urethral swab. Urine testing is the more common option because it’s noninvasive and has strong enough sensitivity for reliable screening. If you’ve had anal sex, a rectal swab can test that site specifically.
Timing matters for accuracy. If you think you were exposed, waiting at least one week gives the test a good chance of detecting the infection. Waiting two weeks catches nearly all cases. Testing too early after exposure can produce a false negative because the bacteria haven’t multiplied enough to be detected.
You don’t need to have symptoms to request a test. Any sexual health clinic, primary care office, or urgent care center can order one. Many online services now ship at-home collection kits as well.
What Happens If It’s Positive
Chlamydia is curable with a short course of antibiotics. The standard treatment is a seven-day course of an antibiotic taken twice daily by mouth. There’s also a single-dose alternative, though the seven-day regimen is now preferred. You should avoid sex for seven days after completing treatment (or seven days after the single dose) to prevent passing the infection to a partner.
Any recent sexual partners need to be notified and treated too, even if they feel fine. Reinfection from an untreated partner is one of the most common reasons people test positive again. The CDC recommends retesting three months after treatment to catch repeat infections, whether from a untreated partner or a new exposure.
Risks of Leaving It Untreated
Because chlamydia so often flies under the radar, it’s worth understanding what happens when it lingers. The most recognized complication in men is epididymitis, an inflammation of the coiled tube behind each testicle that stores and carries sperm. This causes scrotal pain and swelling and can become quite uncomfortable. In some cases, the infection spreads to the testicle itself.
There’s also evidence that chlamydia can affect male fertility. The bacteria can directly damage sperm by increasing DNA fragmentation and impairing the sperm’s ability to penetrate an egg. Research has found chlamydia in up to 39.5% of men with prostatitis (inflammation of the prostate), though its exact role in causing that condition is still debated. A related condition called reactive arthritis, where the immune system triggers joint pain and swelling after an infection, is another possible complication, though it’s uncommon.
Who Should Get Tested Routinely
If you’re sexually active with new or multiple partners and aren’t consistently using condoms, periodic testing is a reasonable precaution regardless of symptoms. Men who have sex with men face higher rates of chlamydia and are generally advised to test at least annually, including rectal testing if relevant. Anyone diagnosed with another STI should also be tested for chlamydia, since co-infections are common.
The core takeaway is simple: you almost certainly won’t be able to “tell” you have chlamydia from how you feel. Symptoms, when they appear, offer a useful clue. But the infection’s defining feature is silence, and a quick urine test is the only reliable way to break it.