Urinary Tract Infections: Why Are Women More Affected Than Men?

Urinary tract infections (UTIs) are among the most common reasons for medical consultations. It is estimated that one in two women will suffer from a UTI at least once in their life, often between the ages of 20 and 40. In contrast, such infections are much rarer in young men, accounting for less than 5% of cases. This imbalance is largely due to anatomical and physiological differences, but also to how these infections are diagnosed and treated.

A Matter of Anatomy

A Much Shorter Urethra in Women

In women, the urethra the canal connecting the bladder to the outside measures only about 3 to 4 cm. In men, it is much longer, between 15 and 20 cm. This makes it far easier and faster for bacteria to reach the bladder in women.

A common question from patients:

“Why do I have an infection if I’m clean?”

The answer: Most urinary tract infections are caused by bacteria naturally present in the digestive tract, such as Escherichia coli. It’s not a matter of hygiene, but rather a natural contamination process, made easier by the close proximity between the anus and urethra in women.

Proximity of Openings in Women

In women, the anus, vagina, and urethra are located very close together. This increases the likelihood of bacteria migrating from the intestines to the urinary tract, especially after sexual intercourse or incorrect wiping techniques (wiping back to front).

Practical advice: Always wipe from front to back, and urinate after sex to reduce the risk of cystitis.

Similar Symptoms… But Different Diagnoses

In Women: Simple Acute Cystitis

The symptoms are well known:

• Burning during urination
• Frequent urge to urinate
• Cloudy or foul-smelling urine
• Lower abdominal pain
• Sometimes blood in the urine

There is usually no fever, no significant lower back pain, and treatment generally involves a single dose antibiotic or a course lasting three to five days.

Common question: “Do I always need a urine test?” Not necessarily. In young, healthy women with typical symptoms, diagnosis can often be made clinically without a test.

In Men: Never Just a Simple Cystitis

A lower urinary tract infection in men is almost always considered to be acute prostatitis, even if the symptoms seem similar:

• Burning when urinating
• Frequent urination (pollakiuria)
• Pelvic heaviness

However, it often involves fever, chills, fatigue, and sometimes pain in the perineum or rectum. Since the prostate is located just beneath the bladder and surrounds the urethra, it is commonly affected when a UTI occurs in men.

UTI Treatment: Simple for Women, More Complex for Men

Cystitis in Women: Short and Targeted Treatment

First-line treatment often includes:

• Fosfomycin trometamol (Monuril®), taken once or over three doses across five days
• Pivmecillinam or nitrofurantoin for 3 to 5 days, depending on the case

It's important to avoid broad-spectrum antibiotics to limit resistance.

Prostatitis in Men: Longer Treatment and Monitoring

Treatment must:

• Last at least 14 days
• Use antibiotics that penetrate the prostate well, such as fluoroquinolones (Ciprofloxacin, Levofloxacin), sometimes in combination with another drug

A urine analysis is essential, often accompanied by a digital rectal exam and a PSA test if there is any doubt.

Common question: “Can it become chronic?” Yes, if poorly treated, prostatitis can become chronic and difficult to manage. This is why accurate diagnosis is key.

Conclusion: Two Sexes, Two Approaches

The high frequency of urinary infections in women is mainly due to anatomical reasons. In men, UTIs are rare but more serious, often involving the prostate. It's therefore essential to tailor both diagnosis and treatment to each sex.

Key takeaways:

• Cystitis in women is common but usually benign
• UTIs in men are always a warning sign
• Treatment differs significantly in both duration and strategy