Health condition
Kidney stones prevention
Half of people who pass a kidney stone will form another within ten years - unless they act. Prevention is genuinely effective, and starts with knowing your stone type and your urine chemistry.
Why trust this guide
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Editorial team
Written by our editorial team from the UK sources listed on each page.
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Sourced from guidance
Checked against current NHS and UK specialist society guidance at the time of review.
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Current for 2026
Reviewed on 2026-09-27 with the next review scheduled for 2027-09-27.
Key facts
The essentials at a glance.
The symptoms to recognise, when to seek help, which specialist to see, and what treatment usually involves.
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Who should focus on prevention: anyone after a first stone, and especially recurrent formers, those with a family history, or stones on both sides
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Seek urgent help for stone pain with fever - an infected obstructed kidney is an emergency
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Specialist: a consultant urologist usually leads assessment and treatment
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The universal prescription: drink enough to pass 2.5 litres of urine daily, normal dietary calcium, less salt, moderate animal protein - plus targeted medication guided by 24-hour urine testing
Understanding the condition
What it is and what happens next.
What causes it, how it is diagnosed, and the treatment routes available in the UK.
What it is and how it feels
Most stones are calcium oxalate, and counter-intuitively the answer is not cutting calcium - normal dietary calcium binds oxalate in the gut and protects, while low-calcium diets make stones worse. Salt drives calcium into the urine, so sodium restriction matters more. Uric acid, infection and cystine stones each have their own specific strategies, which is why stone analysis is so useful.
Diagnosis and treatment routes
For recurrent formers, a 24-hour urine collection identifies the personal chemistry at fault - low volume, high calcium, high oxalate, low citrate or acidic urine - and targets treatment: thiazides, potassium citrate or allopurinol each address specific patterns. Structured prevention halves recurrence, a better return than any operation. In many parts of the UK, routine NHS referrals for this kind of problem currently take 20-45+ weeks, whereas an initial appointment with a private consultant is typically available within around two weeks.
Seeing a specialist
Who to see, and how quickly you can be seen.
The specialist for this condition is usually a consultant urologist. Your GP can refer you on the NHS, or you can arrange a private consultation directly.
A quiet reminder
This guide is for information, not medical advice.
Your GP knows your history and can tell you which parts apply to you. If in doubt, see them - and seek urgent care for any of the emergency symptoms described above.
Frequently asked
Common questions about Kidney stones prevention.
Quick, plain-English answers to what people ask us most.
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How can kidney stones be prevented?
The most effective general measure is drinking enough fluid to keep urine pale and dilute throughout the day, ideally aiming for around 2 to 2.5 litres daily unless advised otherwise. Reducing salt intake, moderating animal protein and maintaining a healthy weight also lower risk.
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What causes kidney stones to form?
Stones form when urine becomes overly concentrated with stone-forming minerals such as calcium, oxalate or uric acid, allowing crystals to develop and clump together. Dehydration, certain diets, some medical conditions and family history all increase this risk.
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Are kidney stones genetic?
There is a hereditary tendency towards stone formation, and having a parent or sibling with kidney stones roughly doubles your own risk. A small number of stones are linked to specific inherited metabolic disorders.
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Is diet important for preventing kidney stones?
Yes, diet plays a significant role: reducing salt and animal protein, maintaining adequate calcium intake from food (rather than restricting it), and limiting foods very high in oxalate if you form calcium oxalate stones can all help. A dietitian or urologist can give tailored advice based on your specific stone type.
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Can recurrent kidney stones be stopped completely?
While no strategy guarantees you'll never form another stone, identifying your stone type through analysis and tailoring prevention accordingly significantly reduces recurrence risk. Some people with a strong tendency to form stones may also benefit from specific preventive medication.
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How is stone type identified to guide prevention?
If you pass a stone, it can be sent for laboratory analysis to determine its composition, and blood and 24-hour urine tests can identify metabolic risk factors. This information allows prevention advice to be tailored specifically to your stone-forming tendency.
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How long should prevention measures be continued?
Prevention measures such as good hydration and dietary adjustments are generally recommended indefinitely, as the tendency to form stones typically persists over time. Regular follow-up can help confirm that measures are working.
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Dietary calcium restriction vs adequate calcium intake — what's the right approach for stone prevention?
Contrary to old advice, restricting dietary calcium is generally not recommended and can actually increase stone risk, because calcium in the gut binds oxalate and reduces its absorption. Most specialists now recommend maintaining a normal calcium intake from food while addressing other specific risk factors.
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When should I see a specialist about kidney stone prevention, and how quickly can I be seen privately?
If you've had more than one kidney stone, or a stone with unusual features, specialist assessment for metabolic risk factors is worthwhile. Private urology consultations can typically be arranged within about two weeks, much sooner than standard NHS waiting times.