Historically, men are significantly more likely to develop kidney stones than women. In the UK, data suggests that approximately 3 in 20 men (15%) will develop a kidney stone in their lifetime, compared to roughly 2 in 20 women (10%). However, medical evidence shows that this “gender gap” is rapidly narrowing. While male rates have remained relatively stable, the incidence among women has risen sharply over the last two decades, particularly in younger age groups.
What We will cover in this Article
- The historical and current prevalence of stones by gender
- Biological reasons for higher male risk (Urine chemistry and hormones)
- Why the gap is closing: Rising risks in the female population
- Age-related peaks for stone formation in men vs. women
- A data comparison table of gender-specific risks
- Gender-specific prevention strategies
Why Men are at Higher Risk
The primary reason men are more susceptible to stones is linked to urine chemistry. Men naturally excrete higher levels of calcium, oxalate, and uric acid into their urine. When these minerals are highly concentrated, they crystallise more easily. Furthermore, men tend to have a lower urinary pH (more acidic urine), which is a major trigger for the development of uric acid stones.
Lifestyle factors also play a significant role. Men in the UK are statistically more likely to consume a diet high in animal protein and salt, both of which increase the mineral load on the kidneys. Additionally, men often have a lower total fluid intake compared to women, leading to more concentrated urine.
- Metabolic Factors: Men have higher levels of “supersaturation” for stone-forming minerals.
- Hormonal Influence: Testosterone may promote the liver’s production of oxalate.
- Dietary Patterns: Higher intake of red meat and sodium.
Why the Gender Gap is Closing
The most “amazing” data in recent urological studies is the shift in female stone rates. While men still hold the lead, the ratio has shifted from roughly 3:1 in the 1970s to nearly 1.3:1 today. This shift is primarily driven by three factors:
- Obesity and Diabetes: These conditions are major stone triggers. Data shows that obesity increases the risk of stones more significantly in women (up to a 2x increase) than it does in men.
- Menopause: Oestrogen is naturally protective; it helps keep calcium in the bones and out of the urine. When oestrogen levels drop after menopause, women’s risk of developing calcium stones increases.
- Chronic UTIs: Women are much more likely to suffer from chronic urinary tract infections. Certain bacteria produce ammonia, which creates an alkaline environment leading to struvite stones (infection stones).
Amazing Data: Gender Risk Snapshot
The following table highlights how kidney stones manifest differently across genders, reflecting well-rounded data from UK and global health cohorts.
Data Table: Kidney Stone Risk by Gender
| Feature | Men (High Risk) | Women (Rising Risk) |
| Lifetime Risk | ~13–15% | ~8–10% |
| Peak Age for First Stone | 40–60 Years | Late 20s and Post-Menopause |
| Most Common Stone Type | Calcium Oxalate / Uric Acid | Calcium Oxalate / Struvite |
| Primary Driver | Diet & Urine Chemistry | Obesity & Infection |
| Recurrence Rate | Higher (Symptomatic) | Increasing |
Symptom Differences and Diagnosis
While the internal pain of a stone (renal colic) feels similar for both sexes, the referred pain can differ due to anatomy. In men, the pain often radiates toward the groin or testicles as the stone moves into the lower ureter. In women, the pain is more likely to be felt in the pelvis or labia.
Because women have a higher baseline risk for UTIs, their kidney stones are sometimes misdiagnosed as a simple bladder infection. This is why UK clinicians often recommend a scan (ultrasound or CT) for any woman with “recurrent UTIs” to ensure a stone isn’t the hidden cause.
Summary
Men remain more likely to develop kidney stones than women, largely due to differences in urine chemistry and diet. However, the historical gap is closing as women’s rates rise, driven by metabolic health and post-menopausal changes. Understanding that men face a “metabolic” risk while women often face an “infectious” or “hormonal” risk allows for more targeted prevention strategies, ensuring long-term kidney health for both genders.
If you experience severe, sudden, or worsening symptoms, such as intense pain in your side (flank), blood in your urine, or fever and chills, call 999 immediately.
Why do men get kidney stones earlier than women?
Men’s risk typically peaks between 40 and 60 due to cumulative dietary habits. In women, there is an early peak in the 20s often linked to UTIs and pregnancy, and a later peak after menopause.
Are pregnant women at risk for stones?
Yes. Pregnancy can cause the ureters to dilate and the kidneys to filter more calcium, which can increase the risk of stone formation, though it is still relatively rare.
Does testosterone increase kidney stone risk?
Some studies suggest that testosterone can increase the amount of oxalate the liver produces, which may explain why men have higher mineral levels in their urine.
Is it true that women have ‘infection stones’ more often?
Yes. Struvite stones are caused by specific bacteria and are significantly more common in women because women suffer from UTIs more frequently than men.
How can women reduce their rising risk?
Focusing on weight management, staying hydrated, and managing UTIs promptly are the most effective ways for women to counteract the rising trend of stone formation.
Authority snapshot
This article was reviewed by Dr. Stefan Petrov, a UK-trained physician with an MBBS and extensive experience in the NHS. Dr. Petrov has managed hundreds of stone cases in acute settings and has a keen interest in the epidemiological shifts affecting UK urology. This guide follows the standards set by the British Association of Urological Surgeons (BAUS) and the NHS to ensure accurate information for all demographics.
