The First Sign of Kidney Disease Is Usually Nothing at All
Early kidney disease rarely announces itself. By the time symptoms appear, function is often well reduced. A simple blood and urine test is the only way to catch it early, and you do not need a doctor's referral.
What is the first sign of kidney disease?
For most people, the honest answer is that there is no first sign you can feel. The kidneys carry a large reserve of capacity, so a person can lose a significant share of function before anything feels wrong. This is why kidney disease is so often described as a quiet condition.
The earliest reliable sign does not show up in how you feel. It shows up on a test. Usually it is a small rise in waste products in the blood, or a trace of protein in the urine, both of which appear long before symptoms do. That is the whole argument for testing: it finds the problem at the point where something can still be done about it.
When symptoms finally do appear, they are easy to put down to a busy life, stress or getting older. The changes below are worth knowing, but none of them is an early-warning system you should wait for.
The subtle changes to watch for
If kidney function drops far enough, the body starts to show it. These signs tend to be vague and build slowly, which is part of why they are missed.
Changes in urination
Foamy or frothy urine, which can mean protein is leaking through; needing to pass urine more at night; or a change in colour or amount.
Puffiness and swelling
Puffiness around the eyes in the morning, or swelling in the ankles, feet and hands, as the kidneys hold on to salt and fluid.
Tiredness and poor focus
Persistent fatigue and trouble concentrating, as waste builds up and the kidneys make less of the hormone that supports red blood cell production.
Itchy or dry skin
Ongoing itch and dry skin can follow a build-up of minerals and waste products that healthy kidneys would normally clear.
Appetite and nausea
Poor appetite, nausea or a metallic taste in the mouth, which usually arrive later as toxins accumulate.
Cramps and poor sleep
Muscle cramps and restless, broken sleep, often linked to shifts in the body's electrolyte balance.
Why early kidney testing matters in South Africa
Kidney disease in South Africa is driven largely by diabetes, high blood pressure and HIV, conditions that are common and frequently undiagnosed. What testing looks like in practice, though, depends a great deal on where a person sits.
Feeling fine is not reassurance
Routine bloods are usually covered, yet many people skip them because nothing feels wrong. Kidney disease gives no such warning. A low-cost panel between GP visits is a sensible safety check, especially with diabetes or high blood pressure in the picture.
Catching it before options narrow
State clinics are stretched, and screening is often reserved for people who are already unwell, so many present late. Dialysis places in the public sector are limited and rationed. Affordable testing without a referral can find a problem while it is still manageable.
A quick check, no GP needed
Long travel days and a warm climate make dehydration easy, which puts the kidneys under strain. Visitors managing diabetes or blood pressure can get a check without registering with a local doctor or arranging a referral.
A note on traditional and herbal remedies. Some traditional preparations used across communities can place real strain on the kidneys. If you take them regularly, a periodic kidney check is worth doing, and worth mentioning to whoever interprets your results.
Risk factors that make testing worthwhile
If one or more of these applies to you, your kidneys are worth checking even when you feel completely well.
- Diabetes. The leading cause of kidney disease; raised blood sugar slowly damages the kidneys' filtering units. Unsure of your blood sugar? A glucose tolerance screen is R95.
- High blood pressure. Both a cause and a result of kidney damage; very common and often undiagnosed.
- Family history. A parent or sibling with kidney failure raises your own risk.
- Age over 60. Kidney function naturally declines with age.
- Living with HIV. Kidney involvement is a recognised risk, so regular monitoring matters. If you do not know your status, a confidential HIV screen is R168.
- Heart disease or a previous stroke. The heart and kidneys are closely linked.
- Repeated urinary or kidney infections, or kidney stones. These can leave lasting damage.
- Long-term use of some anti-inflammatory pain medicines, and regular use of certain herbal preparations that can stress the kidneys.
How is kidney disease detected early?
Two tests work together, and neither needs a referral.
A blood test
Measures creatinine and urea, the waste products the kidneys clear from the blood. Creatinine is used to estimate how well the kidneys are filtering. A rise suggests the filters are not keeping up.
A urine test
Checks for protein and blood in the urine. Protein leaking into the urine is often the earliest measurable sign of damage, sometimes before the blood markers shift at all.
Because the urine can change first, pairing the blood panel with a urine check gives the most complete early picture. Epicentre's Kidney Package covers the blood markers, and urinalysis and albumin can be added on request.
The Epicentre Kidney Package
A focused panel of kidney filtration markers, drawn in a single visit at any branch. The packages are a guide, not a fixed list: you can add tests, remove any you do not want, or build your own.
Kidney Package
R380 full packageIncluded in the package
- U&E and Creatinine. Kidney filtration and the balance of biochemical salts in the blood.
- Serum Creatinine. A key marker used to estimate filtration.
- Alkaline Phosphatase (ALP). Supports a wider picture of liver and bone health.
- BUN (Blood Urea Nitrogen). How much urea waste is in the blood.
Add on request
- Urinalysis / Urine Culture (MCS). Checks the urine for protein, blood and infection. R600
- Albumin. A protein whose level reflects kidney and liver function. R72
- Uric Acid. Useful where kidney stones or gout are a concern. R86
For the fullest early-detection picture, pairing the blood panel with the urinalysis is worthwhile, since the urine can flag protein before the blood markers move.
What this test does not do
The Kidney Package is a screen, not a diagnosis. It is there to flag whether something needs a closer look, and it gives you a clear result to take to your doctor.
- It does not name a specific kidney disease or its cause on its own.
- It does not stage chronic kidney disease or replace a kidney specialist's assessment.
- A single normal result is reassuring but not a guarantee; risk factors still call for regular checks.
- Results are meant to inform a conversation with a registered healthcare practitioner, who can interpret them alongside your history and any further tests.
The patients who do best are almost always the ones who tested before they felt anything. By the time the kidneys cause symptoms, you have lost ground you cannot easily get back. A short panel once a year, if you carry any of the common risks, is one of the most useful things you can do for yourself.
First signs of kidney disease: quick answers
Kidney testing in Cape Town, Durban and Johannesburg
The Kidney Package is available at all three Epicentre walk-in labs. Walk in, or book online first.
Sources
- National Kidney Foundation. Signs and symptoms of kidney disease.
- National Kidney Foundation. Chronic kidney disease (CKD): testing with eGFR and urine albumin.
- The prevalence of chronic kidney disease in South Africa. Peer-reviewed review, PubMed Central.
- Chronic kidney disease in sub-Saharan Africa. The Lancet Global Health.
Medically reviewed by Dr Samantha Naidoo, MB ChB, FCP (SA), Medical Director at Epicentre Walk-In Labs. Reviewed 2 June 2026. This article is general health information, not a medical diagnosis. Epicentre Aids Risk Management (Pty) Ltd provides diagnostic laboratory testing and does not provide diagnoses, treatment or prescriptions to the public; results are intended to inform discussions with a registered healthcare practitioner.
Check your kidneys before they ask you to
The whole point of early testing is that it works before you feel anything. Walk in at Observatory in Cape Town, Hillcrest in Durban or Parktown North in Johannesburg, or message us if you are not sure where to start.
