Chronic Kidney Disease (CKD): A Simple Guide for Patients

Chronic Kidney Disease (CKD): A Simple Guide for Patients

Chronic Kidney Disease (CKD) means your kidneys are not working as well as they should, or they have a long‑term structural problem. It’s common, often silent, and usually manageable.

What CKD Means

Your kidneys filter waste, balance fluids, and help control blood pressure. In CKD, this filtering slows down over months or years.

Most people:

• Feel completely well in early CKD
• Do not notice symptoms until later stages
• Never progress to kidney failure (and the need for dialysis or a kidney transplant)

How CKD Is Diagnosed

Doctors look at two things:

1. Kidney function (eGFR)

This is a blood test showing how well your kidneys filter.

2. Urine protein (ACR)

Protein in the urine is an early sign of kidney damage.

CKD is diagnosed if either is abnormal for at least 3 months.

5 CKD Stages (Simple Version)

Common Causes

• Diabetes
• High blood pressure
• Age‑related kidney changes
• Inflammation of the kidneys (glomerulonephritis)
• Medication (especially NSAIDs, lithium)
• Blockages (e.g. prostate problems, kidney stones)
• Genetic conditions (e.g. polycystic kidney disease, PKD)

Symptoms (Often Only in Later Stages)

You may feel completely normal. If symptoms do appear, they can include:

• Tiredness
• Swollen ankles
• Shortness of breath
• Itching or cramps
• Nausea or poor appetite
• Needing to pass urine at night

These usually happen when kidney function drops below 30 ml/min (CKD Stage 4)

Red Flags — Seek Urgent Help

• Chest pain or severe breathlessness
• Very little urine
• Severe swelling
• Palpitations or muscle weakness (possible high potassium)

Treatment: What Helps Protect Your Kidneys

Most people benefit from:

• ACE inhibitors / ARBs – protect kidneys and reduce protein in urine
• SGLT2 inhibitors – slow CKD progression and protect the heart
• Statins – reduce heart disease risk

Lifestyle Tips

These make a big difference:

• Keep blood pressure around 130/80
• Avoid NSAIDs (ibuprofen, naproxen)
• Stop smoking
• Stay active
• Eat a balanced diet
• Avoid very high‑protein diets in advanced CKD
• Follow advice on potassium or phosphate if needed

Fluid intake: Drink normally unless your doctor advises otherwise. Some people with advanced CKD or heart problems may need fluid restriction.

Complications to Be Aware Of

CKD can increase the risk of:

• Heart disease (the biggest risk)
• Anaemia (low blood count)
• Bone and mineral problems
• High potassium
• Too much acid in the blood

These can be monitored and treated.

Monitoring

How often you need tests depends on your stage:

• Stages 1–2: every 6–12 months
• Stage 3: every 3–6 months
• Stage 4: every 2–3 months
• Stage 5: monthly or as advised

Tests usually include:

• Blood tests (eGFR, creatinine, potassium)
• Urine ACR
• Blood pressure checks

When to See a Kidney Specialist

Referral is usually needed if:

• eGFR falls below 30 ml/min (Stage 4 CKD)
• Kidney function drops quickly
• Protein in urine is high
• Cause is unclear
• Blood pressure is hard to control
• Family history of kidney disease

Frequently Asked Questions

Can CKD be reversed? Usually not, but it can often be slowed or stabilised.

Can I take painkillers? Avoid NSAIDs. Paracetamol is safer.

Do I need a special diet? Early CKD: healthy balanced diet. Later CKD: may need potassium or phosphate advice.

Is exercise safe? Yes — regular moderate activity is encouraged.

Key Message

CKD is common, often silent, and usually manageable. With early detection, regular monitoring, and good heart and kidney care, most people live well for many years.