Differential Diagnosis and Management of Dysuria in Males

Epidemiology & Primary Etiologies

Dysuria in men is most frequently due to urinary tract infection (UTI) in patients ≥ 35 years, urethritis from sexually transmitted infections (STIs) in patients < 35 years, and bladder outlet obstruction from benign prostatic hyperplasia (BPH) in older men. 1

Gonococcal urethritis caused by Neisseria gonorrhoeae is a leading STI‑related source of dysuria in men < 35 years. 1
Non‑gonococcal urethritis (NGU) is most commonly due to Chlamydia trachomatis; other frequent pathogens include Mycoplasma genitalium, Ureaplasma urealyticum (but not U. parvum), and Trichomonas vaginalis. 1
Typical NGU manifestations comprise mucopurulent or purulent urethral discharge, dysuria, and urethral pruritus, although a substantial proportion of cases are asymptomatic. 1

Complicated UTI may present with systemic signs (fever, rigors, altered mental status) and localized symptoms (flank pain, costovertebral‑angle tenderness, acute hematuria, pelvic discomfort). 1
Catheter‑associated UTI occurs in patients with indwelling or recently removed urinary catheters. 1

BPH with accompanying prostatic inflammation is a common non‑infectious source of dysuria and bladder outlet obstruction in older men. [2][3]
BPH is associated with both detrusor overactivity and detrusor underactivity, contributing to lower urinary tract symptoms. [3][4]
Lower urinary tract symptoms such as urinary frequency, urgency, hesitancy, and a weak stream are indicative of BPH‑related obstruction. [2][3]

Presence of fever, rigors, or altered mental status suggests a complicated infection requiring urgent evaluation. 1
Flank pain or costovertebral‑angle tenderness points toward possible pyelonephritis. 1
Recent urologic instrumentation or catheterization increases the risk of catheter‑associated or procedure‑related infection. 1
Immunocompromised status heightens susceptibility to severe urinary infections. 1