Urinary tract infections in men are far less common than in women, but they do happen, and when they do, they tend to be taken more seriously by clinicians because they often signal an underlying problem. The shorter female urethra makes women many times more likely to develop a UTI in any given year, while men’s longer urethral anatomy and prostatic secretions offer some built-in protection during younger years. That protection erodes with age, prostate enlargement, catheter use, and certain medications, and a man’s risk of UTI climbs steadily after about age 50. Because UTIs in men are considered unusual enough to warrant investigation, the diagnostic and treatment approach differs from the more straightforward path women often experience.
Why Men Get UTIs Less Often
The mechanics are straightforward. The male urethra is roughly four to five times longer than a woman’s, which means bacteria have a much greater distance to travel before reaching the bladder. Prostatic fluid also has mild antibacterial properties that help keep bacterial colonization in check. These two factors together explain why UTIs in otherwise healthy younger men are genuinely rare. Most guidelines treat a UTI in a young man without clear risk factors as a “complicated” infection by default, not because it is necessarily dangerous, but because it is unusual enough that a doctor should look for an explanation.
The bacteria responsible for men’s UTIs are largely the same ones that cause infections in women. Escherichia coli is the most frequent culprit, followed by Klebsiella pneumoniae, Proteus mirabilis, Enterococcus faecalis, and Staphylococcus saprophyticus.1PubMed Central. Urinary tract infections: epidemiology, mechanisms of infection and treatment options These organisms normally live in the gut and can migrate to the urinary tract, especially when something disrupts normal urine flow or the body’s usual defenses.
The Prostate Connection
The single biggest driver of UTIs in older men is the prostate gland. As men age, the prostate commonly enlarges, a condition called benign prostatic hyperplasia (BPH). An enlarged prostate squeezes the urethra and makes it harder to fully empty the bladder. Urine that sits in the bladder after voiding becomes a breeding ground for bacteria. In a cross-sectional study at a tertiary hospital, men with prostate volumes larger than 80 cubic centimeters had a UTI rate nearly double that of men with smaller prostates, and men who could not fully empty their bladders had roughly twice the odds of developing a UTI compared with those who emptied completely.2BMJ Open. Urinary tract infections and associated factors among patients with an enlarged prostate at a tertiary hospital, Dar es Salaam, Tanzania: a hospital-based cross-sectional study
Interestingly, the relationship between BPH and UTI is not as clean-cut as it sounds. While incomplete bladder emptying is a plausible mechanism, some research has noted that the direct link between post-void residual urine volume and UTI in aging men is not firmly established.3PubMed. Complicated urinary tract infection in patients with benign prostatic hyperplasia The picture gets complicated because older men also accumulate other risk factors at the same time: weakened immune function, diabetes, catheter exposure, and declining mobility. Teasing apart which factor is doing the most damage in any individual case is often difficult.
Catheter-Associated Infections
If you have ever been hospitalized and had a urinary catheter placed, your risk of UTI jumps substantially. Catheter-associated UTI (CAUTI) is the most common hospital-acquired infection overall and a leading cause of secondary bloodstream infections.4PubMed Central. Catheter-Associated Urinary Tract Infections: Current Challenges and Future Prospects The catheter creates a direct highway for bacteria to enter the bladder and also disrupts the protective lining of the urinary tract. The longer a catheter stays in, the higher the risk. Men undergoing prostate surgery, recovering from major operations, or dealing with spinal cord injuries are particularly exposed.
Diagnosis becomes trickier with a catheter in place. Bacteria often colonize the catheter without causing a true infection, and treating that colonization with antibiotics does more harm than good by promoting resistant organisms. A negative urinalysis in catheterized men still has a high predictive value for ruling out a true UTI, but the traditional culture threshold of 100,000 colony-forming units per milliliter can miss about one in five genuine catheter-associated infections.5PubMed. Urinalysis is predictive for absence of urinary tract infection in men with and without catheters If you have a catheter and start feeling feverish, that warrants attention even if earlier urine tests looked clean.
Medications That Raise Risk
A class of diabetes drugs called SGLT2 inhibitors (brand names include Jardiance, Farxiga, and Invokana) works by pushing excess glucose out of the blood and into the urine. That glucose-rich urine can fuel bacterial growth. Analysis of global adverse-event data suggests an elevated risk for both ordinary and complex UTIs in men taking these drugs, with the risk particularly pronounced in older men who may already have BPH-related voiding problems.6PubMed. SGLT2 Inhibitor and Urinary Tract Infection in Men at Risk for Voiding Dysfunction: A VigiBase Analysis This does not mean you should stop taking a prescribed SGLT2 inhibitor, but it is worth discussing with your doctor if you have a history of urinary problems or recurrent infections. Staying well-hydrated and monitoring for UTI symptoms are practical steps.
When It Might Not Be a UTI
Several conditions in men mimic UTI symptoms, and getting the right diagnosis matters because the treatments differ. The two most important look-alikes are prostatitis and sexually transmitted infections.
Acute bacterial prostatitis is essentially a UTI that involves the prostate gland. It typically causes fever or chills on top of the usual burning and frequency, and in most cases the responsible bacteria are gram-negative organisms like E. coli. Chronic bacterial prostatitis presents differently: repeated UTIs caused by the same bacterial strain, often with pelvic pain between episodes.7JAMA. Prostatitis: A Review If your UTIs keep coming back despite proper treatment, prostatitis is high on the list of explanations.
Sexually transmitted infections with Chlamydia trachomatis or Mycoplasma genitalium can also produce dysuria and urethral discomfort that feel indistinguishable from a UTI. One study found Chlamydia in a fifth of symptomatic men presenting to a urology clinic, and Mycoplasma genitalium in about one in eight.8PubMed Central. A survey on the prevalence of Chlamydia trachomatis and Mycoplasma genitalium infections in symptomatic and asymptomatic men referring to urology clinic of labbafinejad hospital, tehran, iran Standard UTI antibiotics like trimethoprim or nitrofurantoin will not clear these organisms. If you are sexually active and develop urinary symptoms, particularly urethral discharge, it is reasonable to ask about STI testing alongside a urine culture.
Getting Diagnosed
Unlike in women, where a simple UTI can often be treated empirically based on symptoms alone, the standard of care for men typically involves both a urinalysis and a urine culture. A positive urinalysis in a symptomatic man should prompt empiric antibiotic therapy, but the culture ensures the diagnosis is correct and the antibiotic chosen actually covers the organism.9BMJ Best Practice. Urinary tract infections in men This matters more than you might think: resistance patterns in male UTI isolates can be surprisingly high, and picking the wrong antibiotic is a real possibility.
A negative urinalysis is reassuring. When no white blood cells or bacteria show up on dipstick or microscopy, the chance that you have a true UTI is very low.10PubMed. Urinalysis is predictive for absence of urinary tract infection in men with and without catheters Combined urinalysis parameters perform better than any single marker alone at ruling out infection.11Open Forum Infectious Diseases. 2818. Investigating Urinalysis Criteria that Predict UTI: Impact of age, sex, and urine culture thresholds If your dipstick is negative but you still feel terrible, that should prompt consideration of the other diagnoses discussed above.
Imaging is another area where men’s UTIs differ from women’s. Because uncomplicated UTI in men is uncommon, imaging to look for structural abnormalities, kidney stones, or abscesses should be considered early, especially if an infection does not respond to initial treatment.12PubMed. The role of imaging in urinary tract infections An ultrasound checking for post-void residual urine and prostate size is often the first step, with CT reserved for more complex presentations.
Treatment and How Long It Takes
Antibiotics are the mainstay, but the choice of drug and length of treatment have been topics of ongoing debate. Traditionally, men were given longer courses than women, often 10 to 14 days, on the theory that bacteria could be harboring in the prostate where antibiotics penetrate poorly. A clinical trial published in JAMA challenged that assumption, finding that 7 days of antibiotics was as effective as 14 days for resolving symptoms in men with uncomplicated lower UTIs who had no fever.13CIDRAP News. Trial supports shorter antibiotics for UTIs in men Shorter courses reduce side effects and limit the development of resistant bacteria, so this has practical implications for everyday prescribing.
The choice between narrow-spectrum antibiotics (like trimethoprim) and broader-spectrum options (like fluoroquinolones) matters too. A large retrospective study of over 21,000 men found that narrow-spectrum antibiotics and trimethoprim were associated with higher rates of treatment failure and recurrence compared with broader-spectrum drugs.14PubMed Central. Different antibiotic regimes in men diagnosed with lower urinary tract infection – a retrospective register-based study That does not automatically mean every man should get a broad-spectrum antibiotic; overuse of those drugs fuels resistance. It does mean that culture results are especially important for guiding the right choice.
Resistance Is a Growing Problem
Antibiotic resistance in male UTI pathogens is more widespread than many people realize. A large German study of outpatient urine cultures from men between 2015 and 2020 found that nearly half of E. coli isolates were resistant to amoxicillin, roughly a quarter were resistant to trimethoprim, and about one in five were resistant to ciprofloxacin. Multi-drug resistance was present in about 23% of isolates. The good news: resistance to fosfomycin and nitrofurantoin remained below 2%.15PubMed Central. High antimicrobial resistance in urinary tract infections in male outpatients in routine laboratory data, Germany, 2015 to 2020 This is why a urine culture with sensitivity testing is not just a formality in men. Without it, there is a meaningful chance that the empiric antibiotic prescribed will not work against your particular bug.
Complications Worth Knowing About
Most UTIs in men stay confined to the lower urinary tract and resolve with appropriate antibiotics. But when infections ascend to the kidneys (pyelonephritis) or enter the bloodstream, the situation becomes serious. Roughly one in four cases of sepsis originates in the urogenital tract, and the clinical spectrum ranges from a mild bloodstream infection to full septic shock.16PubMed Central. Approach to a patient with urosepsis Fever, flank pain, confusion, or a rapid heart rate in the setting of UTI symptoms are red flags that warrant urgent medical attention.
A prostatic abscess is another complication specific to men. This is a walled-off pocket of infection within the prostate that antibiotics alone cannot adequately reach. Treatment typically requires intravenous broad-spectrum antibiotics combined with drainage of the abscess.17PubMed Central. Management of prostate abscess in the absence of guidelines Prostatic abscesses are uncommon but tend to occur in men with diabetes, immunosuppression, or chronic prostatitis. If a UTI is not improving after several days of antibiotics, especially with persistent fever, imaging of the prostate is warranted.
The Older Men Problem
UTIs become increasingly common and increasingly complicated to manage as men age. By the time men reach their 70s and 80s, rates climb substantially due to the convergence of prostate enlargement, weakened immune systems, more frequent hospitalizations, catheter use, and chronic conditions like diabetes. Men over 60 with enlarged prostates have about twice the odds of developing a UTI compared with younger men.18BMJ Open. Urinary tract infections and associated factors among patients with an enlarged prostate at a tertiary hospital, Dar es Salaam, Tanzania: a hospital-based cross-sectional study
Diagnosis in older men is muddied by asymptomatic bacteriuria, which means bacteria are present in the urine without causing any symptoms. This is common in elderly men, particularly those in nursing homes, and treating it with antibiotics does not improve outcomes but does promote resistance. The challenge is distinguishing true symptomatic UTI from bacteriuria in someone who has vague complaints like fatigue or confusion. Clinicians frequently struggle with this distinction, especially in patients with baseline cognitive impairments.19PubMed Central. Urinary Tract Infection and Asymptomatic Bacteriuria in Older Adults If your elderly father’s nursing home calls to say he has a UTI, it is worth asking whether he actually has urinary symptoms or whether someone simply found bacteria on a routine test.
Prevention
The evidence base for UTI prevention strategies in men is thinner than for women, partly because male UTIs are less common and therefore harder to study in large numbers. Some of the advice that applies to women, like wiping front to back, is obviously irrelevant. What does matter for men is addressing the underlying risk factors.
If you have BPH symptoms like a weak stream, frequent nighttime urination, or difficulty starting, getting those treated with medication or surgery can reduce UTI risk by improving bladder emptying. For men with catheters, the single most effective prevention strategy is removing the catheter as soon as it is no longer needed. Every extra day with a catheter in place increases infection risk.
Staying well-hydrated seems like common sense, but the evidence for fluid intake preventing UTIs comes largely from studies in premenopausal women, and a systematic review found only one high-quality randomized trial demonstrating a benefit, which was in that female population.20Journal of Hospital Infection. Increased fluid intake for the prevention of urinary tract infection in adults and children in all settings: a systematic review That does not mean hydration is useless for men, but the evidence is extrapolated rather than directly proven. Cranberry products, another popular recommendation, have similarly weak evidence in the male population specifically.
The Emotional Toll of Recurring Infections
Recurrent UTIs can affect more than just your urinary tract. A prospective study of patients with recurrent lower UTIs found that nearly two-thirds showed some degree of depression at baseline, and as UTI frequency decreased over the study period, both anxiety and depression scores improved substantially. Quality-of-life measures tracking social activity and daily functioning also improved in parallel with fewer infections.21PubMed Central. Recurrent Lower Urinary Tract Infections Have a Detrimental Effect on Patient Quality of Life: a Prospective, Observational Study Men dealing with repeat infections, pelvic pain, or the uncertainty of chronic prostatitis sometimes feel isolated because UTIs are culturally framed as a “women’s issue.” The reality is that recurrent urinary infections in men carry real psychological weight, and addressing both the infection and the emotional fallout matters for recovery.
Circumcision and UTI Risk in Boys
One piece of the male UTI story involves anatomy at the other end of the age spectrum. In infant boys, UTIs are more common than in older children, and circumcision substantially reduces that risk. A systematic review of data from over 400,000 children across 12 studies found that circumcised boys had about 87% lower odds of developing a UTI compared with uncircumcised boys.22PubMed Central. Circumcision for the prevention of urinary tract infection in boys: a systematic review of randomised trials and observational studies The foreskin harbors bacteria that can ascend into the urinary tract, and removing it eliminates that reservoir. Whether this pediatric finding translates into meaningful UTI reduction in healthy adult men is less clear, since adult male UTIs are driven more by prostate and bladder dynamics than by penile anatomy. The circumcision data is most relevant for parents making decisions about infant boys, particularly those with urinary tract abnormalities that already put them at higher baseline risk.