Urinary tract infections in men are uncommon but not rare. Among men younger than 50, the incidence is roughly 5 to 8 cases per 10,000 per year. That rate climbs significantly after age 50 and continues rising with each decade. Women get UTIs about 30 times more often than men, which is why male UTIs often catch people off guard, but they do happen, and they tend to be more complicated when they do.
Why Men Get Fewer UTIs Than Women
The main reason is anatomy. The male urethra is substantially longer than the female urethra, which means bacteria have a much harder time traveling up to the bladder. Men also benefit from the antibacterial properties of prostatic fluid, which helps kill bacteria before they can establish an infection. These two built-in defenses keep UTI rates low for most of a man’s life.
Risk Rises Sharply After 50
The prostate gland grows with age, a condition called benign prostatic hyperplasia, or BPH. An enlarged prostate squeezes the urethra and makes it harder to fully empty the bladder. Urine that sits in the bladder becomes a breeding ground for bacteria. This is the single biggest reason UTI rates in older men start to approach those seen in women.
Catheter use is the other major driver. Men who need a urinary catheter, whether after surgery, during a hospital stay, or for ongoing urinary retention, face a steep increase in infection risk. Catheters introduce bacteria directly into the urinary tract and bypass the body’s natural defenses. Other risk factors include diabetes, kidney stones, and any condition that weakens the immune system.
How Male UTI Symptoms Differ
The basics overlap with what women experience: burning during urination, frequent urges to go, and cloudy or strong-smelling urine. But men have an additional layer of symptoms because infection can spread to the prostate. When that happens, you may notice pain between the scrotum and rectum (the perineum), discomfort in the lower back or groin, pain in the testicles, or painful ejaculation. Difficulty starting a urine stream or a weak, dribbling flow can also signal that infection has reached the prostate.
Fever is the key dividing line doctors watch for. A UTI confined to the bladder typically doesn’t cause a fever. If you develop a temperature along with urinary symptoms, it usually means the infection has moved beyond the bladder, either into the prostate or toward the kidneys. That distinction matters because it changes how the infection is treated.
Why Male UTIs Are Treated Differently
Clinical guidelines have traditionally categorized most male UTIs as “complicated,” meaning they require more aggressive treatment than the standard 3-to-5-day antibiotic course that works for most women with bladder infections. The reasoning is straightforward: in men, the prostate sits right at the base of the bladder, and bacteria can easily seed into prostate tissue, where they’re harder to eliminate.
Updated 2025 guidelines from the Infectious Diseases Society of America have refined this approach. Rather than automatically labeling every male UTI as complicated, clinicians now focus on whether the infection has spread beyond the bladder. The practical signals they look for include fever, the presence of a catheter, and signs of systemic illness. A man with a simple bladder infection and no fever may receive a shorter course of treatment, while one with fever or prostate involvement will typically need a longer course, often two to four weeks.
Different Bacteria, Different Profile
The bacteria behind male UTIs aren’t always the same ones that cause infections in women. In women, E. coli is responsible for the vast majority of cases. In men, the bacterial landscape is more diverse. Research from the Journal of Clinical Microbiology found that among male UTI patients, Proteus mirabilis accounted for about 35% of infections, Klebsiella pneumoniae for 23%, Enterococcus species for 20%, and E. coli for only about 11%. This wider variety of bacteria is one reason doctors often order a urine culture for men with UTI symptoms rather than prescribing antibiotics based on symptoms alone.
The Prostate Connection
One of the more important things men should know is that UTIs and prostate problems are closely linked. Men with lower urinary tract infections are more likely to develop bacterial prostatitis, an infection of the prostate gland itself. UTIs that come back repeatedly or prove difficult to clear can progress to chronic bacterial prostatitis, which causes ongoing pelvic pain, urinary difficulties, and painful ejaculation that can persist for months.
There’s also evidence that even after the bacteria are gone, the immune system’s response to a past UTI can contribute to chronic pelvic pain syndrome, a condition that mimics prostatitis but has no active infection. This is another reason male UTIs deserve prompt treatment rather than a wait-and-see approach. Clearing the infection fully the first time reduces the chance of long-term prostate complications.
When a UTI in a Man Warrants Investigation
Because UTIs in younger men are genuinely unusual, even a single episode in a man under 50 often prompts further evaluation. Doctors may want to check for structural abnormalities in the urinary tract, kidney stones, or incomplete bladder emptying. In men over 50, a first UTI is less surprising given how common prostate enlargement becomes, but recurrent infections still warrant a closer look. The goal is to identify and address whatever underlying factor is allowing bacteria to gain a foothold, whether that’s an enlarged prostate, urinary retention, or something else entirely.