Short answer
Urethritis, inflammation of the urethra, typically with discharge and burning urination, is the male STI syndrome most likely to bring patients to care.
It divides into gonococcal (gonorrhea) and nongonococcal (chlamydia, trichomoniasis, M.
genitalium, and others) causes, and identifying which organism drives it determines treatment.
Panels test broadly because concurrent infections are common; persistent symptoms after first treatment point toward uncovered organisms and need re-evaluation, not repeated identical prescriptions.
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See Tests & Prices →Causes. The organism roster
Gonococcal: Neisseria gonorrhoeae (often heavier purulent discharge, shorter incubation).
Nongonococcal: chlamydia (most common. Scantier discharge, longer incubation), trichomoniasis (often with itching and irritation), **M.
genitalium** (persistent-recurrent patterns, resistance-prone), HSV and adenovirus (meatal ulceration and dysuria variants), and non-infectious irritation (soaps, spermicides, trauma. Diagnosis of exclusion after NAAT).
Concurrent infections are common enough that narrow testing misses routinely. Order the panel, not the suspicion.
Cause-context at Chlamydia in Men and Gonorrhea Testing.
Symptoms. The presentation spectrum
- Penile discharge (clear through yellow-green. Character suggests, NAAT confirms).
- Burning with urination (dysuria. Shared with UTIs, prostatitis, and irritation).
- Urethral itching or irritation (meatal discomfort between voids).
- Sometimes testicular ache when infection ascends into epididymitis (urgency escalating. Same-day evaluation).
- Some cases mild enough to ignore. And progressing anyway (silence never equals resolution; mild urethritis scars and transmits like severe).
Testing and diagnosis. Organism-directed workups
- First-catch urine or urethral swab NAAT for gonorrhea and chlamydia (plus trichomoniasis testing where indicated. Order explicitly, since default panels vary).
- Microscopy where available (rapid presumptive data guiding same-visit therapy).
- Mgen-specific NAAT for persistent cases (ordered deliberately. Standard panels are blind to it).
- Partners need simultaneous evaluation (reinfection via untreated partners is the commonest “treatment failure”. Network treatment prevents it).
Treatment. Syndromic start, directed finish
- Syndromic first therapy per current CDC guidance covers gonorrhea plus chlamydia pending results (verify the latest regimen at the visit. Guidance evolves with resistance, and outdated summaries mislead).
- Result-directed adjustment follows (de-escalation where possible, expansion where Mgen or trichomoniasis surfaces).
- Abstinence until resolution plus partner treatment plus scheduled retesting complete the protocol. Treatment without the other two elements is a scheduled repeat.
Complications of delay. What waiting risks
- Epididymitis (painful scrotal swelling with fertility implications).
- Prostatitis (pelvic ache with urinary persistence).
- Urethral stricture (scarring narrowing the stream. Procedural correction).
- Ongoing transmission (partners developing PID, ectopic risk, infertility. Male delay concentrating harm in female partners).
Persistent low-grade symptoms deserve evaluation, not endurance. Chronicity reflects mismatched treatment more often than untreatable disease.
When to seek care
Promptly for discharge or burning; urgently for testicular swelling with fever; back promptly when symptoms survive first treatment.