Men get urinary tract infections the same way women do: bacteria, almost always E. coli from the gut, travel up the urethra and colonize the bladder. It happens far less often in men because the male urethra is significantly longer, giving bacteria a much greater distance to travel. But certain conditions, habits, and age-related changes can overcome that built-in protection.
Why Male UTIs Are Less Common
A UTI begins when bacteria from the area around the genitals migrate into the urethra, then work their way up to the bladder. In women, that journey is short. In men, the urethra runs the full length of the penis, creating a longer path that bacteria rarely complete. This is the single biggest reason men develop far fewer UTIs: the incidence in men under 55 is just 0.9 to 2.4 cases per 1,000 per year.
That protection erodes with age. By 85, the rate climbs to 7.7 per 1,000, approaching the rates seen in women of the same age. The shift is largely driven by prostate changes and other conditions that interfere with normal urination.
The Enlarged Prostate Problem
The prostate gland wraps around the urethra just below the bladder. As men age, the prostate commonly enlarges, a condition called benign prostatic hyperplasia (BPH). The growing tissue compresses the urethra and partially blocks the bladder’s outlet, making it harder to fully empty the bladder when you urinate.
That leftover urine is the problem. Stagnant urine sitting in the bladder becomes a breeding ground for bacteria. In some men, the prostate’s middle lobe can enlarge unevenly and create a flap that acts like a ball valve, closing off the bladder outlet during urination and leaving even more residual urine behind. This is the most common reason older men develop UTIs, and it’s also why male UTIs are more likely to be classified as “complicated,” meaning there’s an underlying structural or functional issue involved.
Other Risk Factors
An enlarged prostate isn’t the only pathway. Several other factors make it easier for bacteria to reach the bladder or harder for your body to fight them off:
- Diabetes. Elevated blood sugar leads to higher glucose concentrations in both urine and kidney tissue. That extra sugar creates a favorable environment for bacteria to grow and multiply, raising the risk of both bladder infections and more serious kidney infections.
- Catheter use. Any tube placed in the urethra gives bacteria a direct highway to the bladder, bypassing the body’s natural defenses. Catheter-associated UTIs are one of the most common hospital-acquired infections.
- Being uncircumcised. The foreskin can harbor bacteria near the urethral opening, increasing the chance of colonization.
- Anal sex. This can introduce gut bacteria, particularly E. coli, directly to the urethral area.
- Kidney stones or other blockages. Anything that obstructs urine flow creates the same stagnation problem as an enlarged prostate.
Symptoms to Recognize
A bladder infection in men feels much like one in women: burning or pain during urination, a frequent urge to go, and sometimes cloudy or strong-smelling urine. You may also feel pressure or discomfort in the lower abdomen. Some men notice they need to urinate urgently but produce very little when they do.
The concern with male UTIs is that they can spread to the prostate or kidneys more readily than a straightforward bladder infection in a woman. If the infection reaches the prostate, you may develop a fever, body aches, and significant pelvic pain. The prostate itself becomes swollen and extremely tender. If the infection travels upward to the kidneys, flank pain and high fever typically follow. Either of these represents a more serious situation that needs prompt treatment.
UTI vs. Sexually Transmitted Infection
Burning during urination doesn’t always mean a UTI. In sexually active men, the same symptom is common with urethritis caused by sexually transmitted organisms. The key difference is discharge. A UTI rarely causes visible discharge from the urethra, while STI-related urethritis often does, along with itching at the urethral opening. When a man has burning with urination but no classic UTI bacteria show up on a urine culture, an STI screen is typically the next step. The distinction matters because the infections are caused by entirely different organisms and require different treatment.
How Male UTIs Are Diagnosed
Diagnosis starts with a urine sample. A dipstick test can pick up signs of infection quickly, but a urine culture provides the definitive answer by identifying the specific bacteria and confirming the count. A single bacterial species at 1,000 or more colony-forming units per milliliter in a symptomatic patient is generally enough to confirm the diagnosis. Because male UTIs are less common and more likely to have an underlying cause, your doctor may also want imaging or other tests to check for structural issues like an enlarged prostate or kidney stones, especially if infections recur.
Treatment Takes Longer Than in Women
Men with UTIs typically need a longer course of antibiotics than women with the same infection. Where a woman with an uncomplicated bladder infection might take antibiotics for five days, men are usually treated for seven days or longer. The reason is anatomical: the longer urinary tract and the proximity of the prostate mean the infection can be harder to fully clear. If the prostate itself is infected, treatment may extend to several weeks to ensure bacteria don’t linger in the gland’s tissue and cause a relapse.
Most men start feeling better within a day or two of starting antibiotics, but finishing the full course matters. Stopping early increases the chance the infection comes back or that the bacteria develop resistance.
Reducing Your Risk
The CDC recommends several straightforward habits that lower UTI risk. Staying well hydrated keeps urine flowing and flushes bacteria before they can establish themselves. Urinating after sexual activity helps clear any bacteria that may have been introduced near the urethra. Showers are preferable to baths, and avoiding sprays or powders in the genital area reduces irritation that can make the tissue more vulnerable.
For men dealing with an enlarged prostate, managing that condition is the most effective way to prevent recurrent infections. When the bladder empties completely, bacteria lose the stagnant urine they need to thrive. Men with diabetes benefit from keeping blood sugar well controlled, since lower glucose levels in the urine mean less fuel for bacterial growth.