screening for kidney

Overview

Kidney screening is a group of simple tests that check how well your kidneys are working. The kidneys are two bean-shaped organs that filter waste and extra water from your blood to make urine. Screening helps find kidney disease early, often before symptoms appear, when treatment can slow or prevent further damage.

Kidney disease is common. It affects about 1 in 10 adults worldwide, and the risk increases with age. Many people do not know they have it until it is advanced.

Anyone can develop kidney problems, but people with diabetes, high blood pressure, a family history of kidney disease, or those over 60 years old are more likely to be affected.

Symptoms

Common symptoms

• Feeling more tired than usual
• Swelling in your ankles, feet, or hands
• Shortness of breath
• Puffiness around your eyes
• Foamy or dark urine
• Frequent urination, especially at night
• Itchy skin

Causes

Main causes

• Diabetes and high blood pressure are the leading causes of kidney damage.
• Kidney infections or other kidney diseases, such as glomerulonephritis.
• Blockages, such as kidney stones or an enlarged prostate.
• Certain inherited conditions like polycystic kidney disease.
• Autoimmune diseases that can attack the kidneys, such as lupus.

Risk factors

• Being older than 60 years
• Having diabetes
• Having high blood pressure
• Being obese or overweight
• Having a family history of kidney disease
• Being of African, African-Caribbean, or Asian family background
• Smoking
• Taking certain medicines, such as pain relievers or anti-inflammatory drugs, over a long period

When to see a doctor

See a doctor urgently if:

• If you have any of the emergency signs listed, call your local emergency number immediately.
• If you have blood in your urine, sudden swelling, or other urgent symptoms, seek care the same day.

Book a routine appointment if:

• If you have diabetes, high blood pressure, or another condition that raises your risk, ask your doctor about kidney screening during a routine visit.
• If you are 60 or over and have not had a kidney check, ask at your next appointment.

Diagnosis

Kidney screening is done with simple blood and urine tests. The blood test measures creatinine, a waste product that builds up when kidneys are failing. Your doctor uses the result to calculate your estimated glomerular filtration rate (eGFR), which shows how well your kidneys are filtering blood. The urine test looks for protein or blood in the urine, which can be a sign of kidney damage.

Tests that may be done

• Blood test (creatinine and eGFR)
• Urine test (albumin-to-creatinine ratio)
• Blood pressure measurement
• Sometimes an ultrasound of your kidneys, if your doctor wants a clearer picture

What to expect at your appointment

The tests are quick and usually done at your doctor's office or a clinic. You do not need to fast. You may be asked to provide a small urine sample. Results usually come back in a few days. Your doctor will explain what the numbers mean and what to do next.

Treatment

Treatment for kidney disease focuses on slowing the damage, managing symptoms, and preventing complications. There is usually no cure for long-term kidney disease, but early treatment can keep your kidneys working longer.

Self-care at home

• Take any medicines exactly as your doctor prescribes — including medicine for blood pressure or diabetes. These protect your kidneys even if you feel fine.
• Stay active with regular physical activity, like walking or swimming, most days.
• Stop smoking and limit alcohol.
• Keep your blood pressure at a healthy level — your doctor will tell you your target.
• Make sure you stay hydrated, but do not drink too much if your doctor advises fluid limits.

Medical treatments

Depending on your condition, your doctor may prescribe medicines to control blood pressure, lower blood sugar, reduce protein in urine, or manage complications like anemia or bone problems. If kidney disease progresses, options include living on dialysis (a treatment that filters your blood) or a kidney transplant. Your doctor will talk through your options with you if you ever need to consider these.

When is surgery considered?

Surgery is rare for screening-detected kidney disease. You might need a small procedure if a blockage is found, such as kidney stone removal. For advanced kidney failure, a kidney transplant is an option, but that is a major operation discussed with a specialist.

Living with this condition

Living with kidney disease means sticking to a routine that protects your kidneys. This includes regular medical check-ups, taking medicines as prescribed, and noticing any changes in how you feel. Most people with early kidney disease can live normally for many years.

Lifestyle tips

• Check your feet if you have diabetes — nerve and circulation problems can be connected to kidney health.
• Keep a list of your medicines and review them with your doctor or pharmacist.
• Monitor your blood pressure at home if you have high blood pressure.
• Learn about your eGFR number and what it means — ask your doctor.

Diet and exercise

Eating a balanced, low-salt diet helps control blood pressure and fluid balance. Your doctor or a dietitian may advise you to limit potassium, phosphorus, or protein if your kidney function declines. Regular exercise, like 30 minutes of light activity most days, can improve your energy and heart health. Always ask your kidney team before taking any supplements or herbal remedies, as some can harm kidneys.

Mental health and emotional wellbeing

Being diagnosed with kidney problems can feel worrying or overwhelming. It is normal to feel anxious or low. Talk to your doctor if these feelings last. If you are struggling emotionally, also reach out to a local crisis line or mental health service — trained people are there to listen.

Prevention

You cannot always prevent kidney disease, but you can lower your risk. Keeping your blood pressure in a healthy range, controlling diabetes, staying active, eating well, drinking enough water, and avoiding smoking or excess alcohol all make a big difference.

Vaccines

Some vaccines, like the annual flu shot, are recommended for people with kidney disease because they have a higher risk of infections. Ask your pharmacist or doctor about which vaccines are right for you.

Screening programmes

Regular screening is the best way to catch problems early. If you have a long-term condition like diabetes or high blood pressure, you should be screened at least once a year. Ask your doctor how often you need it.

Complications

If left untreated

• Kidney function may decline faster, eventually leading to kidney failure.
• You could develop high blood pressure, anemia, or weakened bones.
• Your risk of heart disease and stroke increases.
• Fluid and waste can build up in your body, causing swelling, confusion, and breathing trouble.

Long-term outlook

If kidney disease is found early, many people can live well for a long time. Treatment can slow the process, and even lifelong kidney disease can often be managed. Many people with kidney disease continue to work, travel, and enjoy family life. Your healthcare team will support you at every stage.

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