UTI in men: never “just a UTI”

By Mr Torath Ameen, Consultant Urologist · Last reviewed August 2026

In brief

UTI in men is uncommon and usually has an underlying cause, most often incomplete bladder emptying from an enlarged prostate. A first infection in a man warrants urological assessment rather than repeated antibiotic courses.

Urinary tract infection is far less common in men than in women, because the longer male urethra is a better barrier. That is precisely why a UTI in a man should prompt a question a short antibiotic course does not answer: why did this happen?

Why men get UTIs

The commonest reason, particularly from middle age onward, is incomplete bladder emptying caused by an enlarged prostate. Residual urine incubates bacteria, and infections recur until the obstruction is addressed. Other causes include prostatitis (infection or inflammation of the prostate itself, which needs longer, targeted antibiotic treatment), stones, strictures of the urethra, catheters, and occasionally more significant underlying pathology.

What assessment involves

A male UTI assessment overlaps with a prostate assessment, and deliberately so: history and examination, urine studies, a flow test and post-void residual measurement, blood tests including kidney function and, where appropriate, PSA, and cystoscopy or imaging where indicated. The aim is to find the reason, treat it, and prevent the next infection rather than chase it.

Treating the cause

Where an enlarged prostate is the driver, treating it deals with the infections at source. That may mean medication, or one of the modern surgical options I perform, including Aquablation, Rezum and TURP. Prostatitis needs properly selected antibiotics for an adequate duration. Where the underlying problem is a stone or a stricture, each has a definitive surgical treatment of its own.

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Mr Ameen’s dedicated prostate resource: assessment, PSA and biopsy, benign prostate enlargement, and the full range of prostate surgery including Aquablation, Rezum, TURP and robotic prostatectomy. If your infections trace back to your prostate, that is where the detail lives.

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Why it helps that your urologist is also a surgeon

A urinary infection in a man is frequently a symptom of something structural, and structural problems need more than a prescription. Assessment and treatment sit with the same person here: I perform the cystoscopy that finds the cause, and I perform the surgery that corrects it, whether that is treating the prostate, clearing a stone, or reconstructive work. My robotic practice covers urological cancer and reconstructive urology, and it is the reconstructive side that bears most directly here: strictures, fistulae and obstruction are exactly the sort of problem that presents first as infections that will not stop. The cancer side matters too, because it means a low threshold for investigating blood in the urine properly rather than putting it down to the infection. It removes a step, and it means the plan is made by the person who will carry it out.

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A first UTI in a man is a reason to be assessed

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Common questions

Should a man see a urologist after one UTI?

Yes, in most cases. Male UTI usually has an underlying cause, most often related to bladder emptying, and a single assessment can identify and treat it before infections become established.

Can an enlarged prostate cause UTIs?

It is the most common cause in older men. Incomplete emptying leaves residual urine where bacteria multiply. Treating the prostate typically resolves the infections.

Is prostatitis the same as a UTI?

No. Prostatitis is infection or inflammation of the prostate gland itself. It can follow or mimic a UTI but needs longer, specifically chosen antibiotic treatment and specialist follow up.

General information, not a substitute for personal medical advice.