About half of men with chlamydia have no symptoms at all, which makes it impossible to rule out the infection based on how you feel. When symptoms do appear, they typically show up within one to three weeks after exposure and center on the urethra: burning during urination, discharge from the penis, and redness or swelling at the tip. The only reliable way to know for sure is to get tested.
Symptoms to Watch For
When chlamydia does cause noticeable signs in men, the most common include:
- Burning or pain during urination. This is often the first thing men notice. It can range from mild stinging to sharp pain.
- Discharge from the penis. This may be clear, white, or slightly cloudy. It’s typically lighter and thinner than gonorrhea discharge, which tends to be thicker and yellow or green.
- Redness, swelling, or itching at the opening of the urethra (the tip of the penis).
- Testicular pain or swelling. This is less common early on and usually affects one side. If you’re feeling tenderness or heaviness in a testicle, that’s worth taking seriously.
These symptoms overlap heavily with gonorrhea, which is why testing matters more than guessing. Both infections can cause discharge and painful urination, and you can have both at the same time. A doctor can’t tell them apart by looking, and neither can you.
Why You Can’t Rely on Symptoms Alone
Fifty percent of men with chlamydia never develop any symptoms. You can carry and transmit the infection for weeks or months without knowing it. This is why chlamydia is sometimes called a “hidden epidemic.” If you’ve had unprotected sex with a new partner, or a partner has tested positive, the absence of symptoms doesn’t mean you’re in the clear.
When symptoms do show up, the timeline matters. They can appear anywhere from a few days to three weeks after the sexual contact that caused the infection. But plenty of men pass that window feeling perfectly fine and assume they’re negative when they’re not.
How Testing Works
The standard test for chlamydia in men is a urine sample. You urinate into a cup, and the lab runs a nucleic acid amplification test, which detects genetic material from the bacteria. It’s the most accurate method available, and it’s painless. You’ll typically be asked not to urinate for at least one to two hours before the test so the sample contains enough bacterial material.
A urethral swab (a thin swab inserted into the tip of the penis) is another option and can be slightly more sensitive in men without symptoms, but most clinics default to urine because it’s far more comfortable and still highly accurate. If you’ve had oral or anal sex, your provider may also swab your throat or rectum, since chlamydia can infect those sites too.
Results usually come back within one to five days depending on the lab. Many sexual health clinics, urgent care centers, and primary care offices can order the test. At-home test kits that use the same technology are also available in many areas.
Who Should Get Tested
Current guidelines don’t recommend routine chlamydia screening for all heterosexual men at low risk. But testing makes sense in specific situations: if you have any of the symptoms above, if a sexual partner has tested positive, if you have a new partner, or if you’ve had unprotected sex and want peace of mind.
For men who have sex with men, the recommendation is more straightforward. Annual screening at all sites of sexual contact (urethra, rectum, throat) is advised regardless of condom use. If you’re on PrEP, living with HIV, or you or your partners have multiple partners, screening every three to six months is recommended. Men with HIV should be screened at their first evaluation and at least annually after that.
Chlamydia vs. Gonorrhea
These two infections are so similar in symptoms that clinics almost always test for both at the same time. That said, there are some subtle differences. Chlamydia discharge tends to be lighter in color and thinner in consistency. Gonorrhea discharge is more likely to be thick, yellow, or green. Gonorrhea also tends to cause more intense burning during urination, though this varies from person to person. Neither infection produces a reliable “signature” that lets you self-diagnose, so treat any new discharge or urinary discomfort as a reason to get tested for both.
What Happens if It Goes Untreated
Left alone, chlamydia in men can spread to the epididymis, the coiled tube behind each testicle that stores and carries sperm. This condition, called epididymitis, causes pain and swelling on one side of the scrotum, tenderness along the spermatic cord, and sometimes fluid buildup around the testicle. It can lead to chronic pain or, in some cases, reduced fertility if the infection scars the reproductive tract.
Chlamydia can also trigger reactive arthritis in some men, causing joint pain, eye inflammation, and urinary symptoms that persist even after the infection itself is treated. This is uncommon but worth knowing about, especially if you develop joint pain alongside urinary symptoms.
The infection is also transmissible during the entire time it’s present, whether or not you have symptoms. An untreated infection puts your sexual partners at risk, and in women, chlamydia carries more severe long-term consequences including pelvic inflammatory disease and infertility.
What to Expect From Treatment
Chlamydia is curable with a short course of antibiotics. Treatment is straightforward, and symptoms (if you had any) typically start improving within a few days. You’ll be advised to avoid sexual contact for seven days after completing treatment to prevent passing the infection to a partner. Any recent sexual partners should also be tested and treated, even if they feel fine, because of the high rate of asymptomatic infection.
Retesting is recommended about three months after treatment to make sure you haven’t been reinfected, which is one of the most common scenarios. Reinfection from an untreated partner accounts for a large share of repeat chlamydia cases.