Men get urinary tract infections when bacteria enter the urethra and travel into the bladder or deeper structures like the prostate. It’s far less common than in women, with only about 0.9 to 2.4 cases per 1,000 men under age 55, but the risk climbs significantly after 60. When men do get UTIs, the underlying cause is often more complex than simple bacterial exposure.
Why UTIs Are Rarer in Men
The main reason men get fewer UTIs comes down to anatomy. The male urethra is about 20 centimeters (7 to 8 inches) long, compared to just 3 to 4 centimeters (about 1.5 inches) in women. Bacteria have to travel a much greater distance to reach the bladder, and the longer journey makes successful colonization less likely. The physical distance acts as a natural barrier, which is why a UTI in a younger man with no other health issues is relatively unusual.
How Bacteria Get In
The most common route is the same one seen in women: bacteria from the gastrointestinal tract migrate from the bowel area to the urethral opening and work their way upward. E. coli, the gut bacterium responsible for the vast majority of UTIs in women, causes about 25% of male UTIs. The rest are more often caused by other organisms like Proteus and Providencia, with Klebsiella, Pseudomonas, and enterococci playing smaller roles. This broader mix of bacteria is one reason male UTIs can be trickier to treat.
Sexual activity is another pathway. Sexually transmitted organisms like gonorrhea, chlamydia, and mycoplasma can cause infections of the urethra. Bladder infections (cystitis) are more common in men who practice anal intercourse, because of the increased exposure to bowel bacteria near the urethral opening. Using condoms reduces this risk.
The Prostate Factor
For men over 50 or 60, an enlarged prostate is one of the most significant risk factors. The prostate gland wraps around the urethra just below the bladder, and as it grows (a condition called benign prostatic hyperplasia, or BPH), it can squeeze the urethra and partially block urine flow. When the bladder can’t empty completely, the leftover urine creates a warm, stagnant environment where bacteria thrive.
This obstruction raises UTI risk through several mechanisms: bacteria gain easier access to the urinary tract, the normal flushing action of urination is impaired, and the body’s built-in defense systems in the urinary lining become less effective. BPH is the primary reason UTI rates jump so sharply in older men, reaching 7.7 cases per 1,000 in men aged 85 and older.
When bacteria from a UTI spread into the prostate itself, the result is bacterial prostatitis, which can become a recurring problem. Chronic bacterial prostatitis is the most common cause of relapsing UTIs in men, with E. coli responsible for about 80% of those cases. The prostate is difficult for antibiotics to penetrate fully, which is why these infections tend to come back.
Kidney Stones and Other Blockages
Anything that blocks or slows the flow of urine raises infection risk. Kidney stones are a common culprit. A stone lodged in the ureter or bladder can trap urine upstream, creating the same stagnation problem as an enlarged prostate. If the blockage isn’t resolved and infection sets in, there’s a real risk of kidney damage over time. Men with a history of kidney stones should be aware that recurrent UTIs may signal a stone that hasn’t fully passed.
Catheter Use
Urinary catheters are one of the most straightforward ways bacteria bypass the body’s natural defenses. The tube provides a direct path from the outside environment into the bladder, skipping the full length of the urethra entirely. Men who have had a catheter placed during surgery or a hospital stay, or who use one regularly due to urinary retention, face a meaningfully higher infection risk. The longer a catheter stays in place, the greater the chance bacteria will colonize it.
What a Male UTI Feels Like
The core symptoms overlap with what women experience: burning during urination, a frequent or urgent need to go, cloudy or unusual-smelling urine, and discomfort in the lower abdomen. But because male UTIs often involve deeper structures, the symptoms can extend further. Pain or pressure in the perineum (the area between the scrotum and rectum), high fever, and pain during ejaculation may point toward prostatitis rather than a simple bladder infection.
It can be difficult to distinguish between a straightforward UTI and prostatitis based on symptoms alone. Both cause burning and urgency. The key differences tend to be the location and severity of pain: perineal pressure, significant fever, and a general feeling of being quite sick suggest the prostate is involved. A urine culture, and sometimes a physical exam of the prostate, helps clarify the diagnosis.
Why Male UTIs Need More Attention
In women, an uncomplicated bladder infection is common and often resolves with a short course of treatment. In men, UTIs are treated with more caution. Because the male urinary tract’s length normally prevents infection, a UTI in a man often signals something else going on: a blockage, an enlarged prostate, a stone, or an anatomical issue that needs to be identified. Doctors typically order a urine culture to pinpoint the exact bacteria involved, since the range of possible organisms is wider than in women.
Antibiotic courses for men generally run longer than the three-day regimens sometimes used for women. If prostatitis is suspected, treatment may extend to several weeks because of how slowly antibiotics penetrate prostate tissue. For men with recurrent infections, imaging or further testing to look for structural problems is standard practice.
Reducing Your Risk
Staying well hydrated keeps urine flowing and helps flush bacteria before they can establish an infection. Emptying your bladder fully each time you urinate matters, especially if you have an enlarged prostate. If you find yourself straining or feeling like your bladder isn’t empty, that’s worth mentioning to a doctor, both for comfort and infection prevention.
Using condoms during anal intercourse significantly reduces bacterial transfer to the urethra. Good hygiene after bowel movements, particularly wiping or cleaning front to back, limits the migration of gut bacteria toward the urethral opening. For men with catheters, keeping the catheter site clean and having it removed as soon as it’s no longer medically necessary are the most effective protective steps.