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Acute epididymitis and epididymo-orchitis

CDC-based torsion exclusion, STI and urinary testing, organism-directed empiric therapy, partner care and follow-up.

JurisdictionUnited States
Source check2026-08-20
Clinical reviewiatroX editorial team · Clinical editorial review · reviewed 2026-08-20 · due 2027-08-20
AudienceUnited States healthcare professionals
This is an iatroX educational summary of named United States sources, not an official guideline. It does not replace the complete source documents, local policy, specialist advice or clinical judgement. Use the named authority, current FDA labeling, applicable state law, payer rules and local protocol where relevant.

Scope of this summary

Adolescents and adults with acute epididymal pain and swelling lasting less than six weeks. Etiology can be sexually transmitted or enteric. Testicular torsion, abscess, infarction, trauma, tumor, tuberculosis and chronic scrotal pain require separate assessment.
sources for this section:CDC STI

The Bottom Line

  • Maintain a high index of suspicion for spermatic-cord torsion in sudden unilateral scrotal pain, particularly when inflammation or infection evidence is limited; urgent surgical evaluation takes priority.
  • Test all suspected cases for chlamydia and gonorrhea by nucleic-acid amplification and obtain a urine bacterial culture to identify enteric organisms and guide susceptibility.
  • Treat presumptively at the visit in sexually active patients, selecting the CDC regimen from risk for chlamydia or gonorrhea, insertive anal sex and enteric urinary pathogens.
  • Use ceftriaxone plus doxycycline for likely gonococcal or chlamydial disease, add enteric coverage in the defined exposure context, and use levofloxacin alone only when enteric infection is likely and gonorrhea has been ruled out.
  • Provide abstinence, partner evaluation for the preceding 60 days, STI testing and public-health care when an STI cause is suspected or confirmed.
sources for this section:CDC STI

Practical clinical workflow

1
Document onset, trauma, urinary and urethral symptoms, sexual sites and exposures, anal intercourse, instrumentation and prior urinary disease; examine both testes, epididymides, cord, hernia and skin.
2
If torsion is clinically possible, obtain immediate urologic evaluation and use Doppler ultrasound only when it does not delay exploration; partial torsion can mimic epididymitis.
3
Collect first-void urine for chlamydia and gonorrhea NAAT plus urine culture and assess HIV, syphilis and other STI testing based on exposure.
4
Start the CDC phenotype-specific regimen, provide analgesia, scrotal support and rest, and account for weight, allergy, interactions, renal function and local resistance.
5
Reassess if symptoms have not improved within 72 hours and evaluate persistent swelling after therapy for tumor, abscess, infarction, tuberculosis, fungal disease or another diagnosis.
sources for this section:CDC STI

Safety boundaries and escalation

  • Sudden severe pain, high-riding or transverse testis, absent cremasteric reflex or uncertain diagnosis requires emergency torsion assessment; time-dependent testicular loss is the key harm.
  • Severe pain, fever, systemic toxicity, diabetes or inability to adhere may indicate abscess, infarction, necrotizing infection or need for hospitalization.
  • Do not give fluoroquinolone monotherapy when gonorrhea has not been excluded, and verify current FDA warnings and local susceptibility.
  • Fournier gangrene presents with severe or disproportionate pain, spreading skin change, crepitus or toxicity and needs immediate surgery and broad sepsis care.
sources for this section:CDC STIAUA Acute Scrotum

Localization

CDC STI guidance and US state partner and reporting rules control this pathway. Current local gonococcal resistance and drug availability must be checked.
sources for this section:CDC STI

Source documents

Use the linked source documents for complete recommendations, evidence grading, exclusions and implementation detail.

  1. Centers for Disease Control and PreventionSexually Transmitted Infections Treatment Guidelines, 2021 — EpididymitisMMWR Recomm Rep 2021;70(No. RR-4) · published 2021-07-23 · accessed 2026-08-20
    view source
  2. American Urological AssociationMedical Student Curriculum: The Acute Scrotumupdated November 2022 · published 2022-11-01 · accessed 2026-08-20
    view source
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