Educational draft · awaiting clinical reviewUse Rapid for revision, not patient-care decisions. Check current national and local guidance and the BNF or BNFC before acting.
2 min synopsisUK scopeSources checked 13 Sept 2026Clinical review pending
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An infection history does not cancel torsion
Abrupt unilateral pain, nausea, a high or horizontal testis or an absent cremasteric reflex can mark spermatic-cord ischaemia even when dysuria, pyuria or an STI risk is also present.
Action: Speak directly to emergency urology, record onset, provide analgesia and keep the patient fasted for exploration; do not spend the salvage window awaiting urine, Doppler imaging or response to antibiotics when suspicion is meaningful.
Synopsis
Triage acute scrotal pain safely, use sexual exposure and urinary context to choose samples and empirical cover, and complete culture review, organism-specific partner care and persistent-mass follow-up.
Make the torsion decision from onset, nausea, testicular lie and examination before building an infection explanation; high suspicion goes straight to emergency urology without waiting for Doppler.
Ask what anatomy was exposed, about urethral symptoms and partners, and about instrumentation, obstruction, bacteriuria, prostate symptoms and insertive anal sex; chronological age alone does not select the organism.
Before treatment when feasible, take first-catch urine NAAT for chlamydia and gonorrhoea, gonococcal culture from relevant sites and midstream urine culture when an enteric source is possible.
Key red flags
Escalate abrupt severe pain, nausea or abnormal lie immediately to urology, including when urinary or sexual-health findings appear to support infection.
Resuscitate and obtain surgical help for spreading perineal erythema, skin necrosis, crepitus or pain out of proportion because Fournier gangrene is a debridement emergency.
Persistent fever, increasing focal swelling or a fluctuant area raises abscess, infarction or resistant infection and needs imaging and urology.
Bilateral inflammation, parotid symptoms, immune compromise or tuberculosis or brucellosis exposure widens the organism pathway beyond routine STI and enteric cover.
A discrete testicular abnormality that remains after inflammatory symptoms improve needs urgent ultrasound and malignancy assessment.
Ischaemic history first
Abrupt maximal pain, nausea, a high or horizontal lie, absent cremasteric response or earlier episodes that resolved spontaneously make torsion the immediate working risk.
Necrotising perineal disease
Pain out of proportion, rapidly spreading erythema, bullae, necrosis, crepitus or toxicity is not routine epididymitis and needs immediate resuscitation, broad intravenous therapy and debridement.
Unexpected course
Worsening at three days, persistent fever, focal fluctuation or a remaining intratesticular mass raises abscess, infarction, resistance or malignancy and needs imaging and specialist review.
Investigation priorities
01
Time-stamped bilateral genital and abdominal examinationFirst step
Make the urgent torsion call and identify epididymal localisation, hernia, collection, urinary retention or perineal necrosis.
Management branches
TORSIONSpend no salvage time on infection tests
Onset, nausea, lie or examination leaves meaningful concern for spermatic-cord torsion.
Call emergency urology directly, document onset and examination, give analgesia, keep the patient fasted and prepare for exploration.
Do not await urinalysis, NAAT, Doppler access or symptom response when those steps could delay theatre.
Key medicines
Ceftriaxone plus doxycyclineGive ceftriaxone 1 g intramuscularly once plus doxycycline 100 mg orally twice daily for 10 to 14 days.Check severe beta-lactam allergy, obtain culture when feasible and discuss doxycycline oesophageal irritation, photosensitivity and interacting cations.
Ceftriaxone plus ofloxacinGive ceftriaxone 1 g intramuscularly once plus ofloxacin 200 mg orally twice daily for 10 days.Apply current MHRA restrictions and review renal function, interactions and individual tendon, neurological, psychiatric, vascular, cardiac and glycaemic risk.
National guidance is shown before implementation-dependent detail. Typical adult dose examples remain subject to patient factors, contraindications and the live BNF or specialist protocol. Source check completed 13 Sept 2026; clinical approval remains outstanding.
BASHH epididymo-orchitis guideline 2020Current BASHH-listed body; diagnosis, treatment by likely cause, partner management and follow-up read 13 Sept 2026. People aged 16 or older in UK sexual-health care.
BASHH gonorrhoea guideline 2025Culture, ceftriaxone, resistance and gonorrhoea TOC sections read 13 Sept 2026; a gonococcal result modifies organism-specific follow-up.
BASHH chlamydia guideline 2026NAAT, doxycycline and partner sections read 13 Sept 2026; uncomplicated chlamydia duration does not replace the 10–14-day epididymal regimen.
MHRA fluoroquinolone safety restrictionsCurrent UK restriction checked 13 Sept 2026; use only when commonly recommended alternatives are inappropriate after individual risk assessment.