screening for kidney stone

Overview

Screening for kidney stones means checking for stones in your kidneys when you have no symptoms. It is not a routine test for everyone, but your doctor may suggest it if you are at higher risk. Early detection can help prevent pain and kidney damage.

Kidney stones are common. Around 1 in 10 people will have one at some point in their life, and they are becoming more frequent over time.

Kidney stones affect men more often than women. They are most common in people between 30 and 50 years old, but children and older adults can also develop them. People with diabetes, obesity, or a family history of stones are at higher risk.

Symptoms

Common symptoms

• Sharp pain in your side or back
• Pain that comes in waves and moves to your lower belly or groin
• Pain or burning when you urinate
• Pink, red, or cloudy urine
• Feeling a strong urge to urinate or urinating more often
• Nausea and vomiting

Symptoms in children

• Belly pain
• Vomiting
• Pain or trouble urinating
• Blood in the urine
• Fussiness or crying in younger children

Symptoms in older adults

• Less typical pain, sometimes only a dull ache
• Confusion or restlessness
• Fever or chills
• Weakness or tiredness
• Urinary urgency or difficulty urinating

Causes

Main causes

• Your urine becomes too concentrated, so minerals and salts stick together and form crystals.
• Not drinking enough water over time is the most common cause.
• Some medical conditions and medicines can make stones more likely.

Risk factors

• Taking in too little fluid each day
• Eating a diet high in salt or animal protein
• Being overweight or obese
• Having a family member with kidney stones
• Having had a kidney stone before
• Living with certain conditions like diabetes, gout, or inflammatory bowel disease
• Taking certain medicines, so always ask your doctor about your own medicines

When to see a doctor

See a doctor urgently if:

• Sudden, severe pain in your back or side
• Fever with chills or shaking
• Blood in your urine with pain
• You feel sick and cannot keep fluids down

Book a routine appointment if:

• You have had a kidney stone before and want to talk about screening
• You have a family history of kidney stones
• You have other risk factors, such as diabetes or obesity
• You have been told you have high levels of stone-forming substances in your urine or blood

Diagnosis

Screening for kidney stones uses tests to look for stones before they cause symptoms. You do not need any special preparation unless your doctor tells you to. If you have symptoms, the same tests can also be used to confirm a stone.

Tests that may be done

• Urine test: checks for blood, minerals, and signs of infection
• Blood test: checks kidney function and levels of certain minerals
• CT scan (a type of X-ray): provides clear pictures of the urinary tract
• Ultrasound: uses sound waves to create images and may be used for pregnant people or children
• X-ray: can spot some stones, but may miss smaller ones

What to expect at your appointment

Most tests are painless. For a urine or blood test, you may need to give samples. For imaging, you will lie on a table while the scanner takes pictures. Results may come back within hours or a few days. Your doctor will explain what they show.

Treatment

If screening finds a kidney stone, your care depends on its size, location, and whether it is causing problems. Many small stones pass naturally with time, while larger ones may need treatment to remove them.

Self-care at home

• Drink plenty of water to help the stone move along
• Use plain pain relief that your doctor or pharmacist recommends — ask before taking any medicine
• Try walking or moving gently, if you are able
• Strain your urine to catch the stone so your doctor can test it
• Rest when you need to, but keep drinking fluids

Medical treatments

Your doctor may prescribe a medicine that helps relax the tube carrying urine from your kidney to your bladder, called the ureter. This can help a stone pass more easily. They may also give medicine to reduce pain or prevent infection. Always follow your doctor's advice about any medicine.

When is surgery considered?

If a stone is too large to pass, causes severe pain, blocks urine flow, or is linked to an infection, you may need a procedure. Common options include using sound waves to break the stone into smaller pieces, passing a thin tube to remove the stone, or making a tiny cut in your back to access the kidney. Your doctor will recommend the safest option for you.

Living with this condition

If you have kidney stones or are at risk, your daily focus is on staying hydrated and staying aware of symptoms. Keep up with follow-up appointments and tell your doctor about any new pain or changes in urination.

Lifestyle tips

• Drink enough water every day so your urine is pale yellow
• Limit salt, processed foods, and animal protein
• Include foods with calcium, like low-fat milk, yogurt, and leafy greens — ask your doctor about the right amount for you
• Stay at a healthy weight and stay active
• Avoid drinking sugary sodas or high-fructose drinks linked to stones

Diet and exercise

A balanced diet with plenty of fruits, vegetables, and whole grains is best. Regular, moderate exercise helps with weight control and overall health. Do not cut out calcium entirely — that can actually raise your risk. Speak to your doctor or a dietitian for a plan that fits your specific stone type.

Mental health and emotional wellbeing

Living with kidney stones, especially if they come back, can feel stressful and worrying. It is normal to feel anxious about pain or treatments. Talking with your doctor, a counselor, or a trusted friend can help. You do not have to handle it alone.

Prevention

In many cases, yes. Drinking enough fluids, watching your diet, and making healthy lifestyle changes can significantly lower your chances of forming new stones. If you have had a stone, your doctor may test it to give you specific prevention advice.

Screening programmes

Screening is not a routine test for everyone. If you are at high risk, your doctor may recommend periodic urine and blood tests or imaging to catch stones early. There is no standard home screening, so always check with a healthcare provider.

Complications

If left untreated

• A stone that blocks urine flow can cause severe pain and infection
• Repeated stones can scar or damage the kidneys
• A urinary tract infection can spread to the kidneys or bloodstream
• Rarely, a blocked kidney can lose some function

Long-term outlook

With proper care, most kidney stones pass or are treated successfully. The future is generally positive — many people prevent future stones successfully by making simple changes. Even if a stone returns, there are many effective ways to manage it.

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