Chronic Kidney Disease: Symptoms, Diagnosis and Treatment

Overview

Chronic Kidney Disease (CKD) is a gradual, usually irreversible decline in kidney function over months to years. The kidneys filter waste and excess fluid from the blood, regulate blood pressure, and produce hormones important for bone health and red blood cell production — as function declines, these processes are disrupted.

CKD affects an estimated 1 in 7 adults, though most don't know they have it because early stages are typically silent. The most common causes are diabetes and high blood pressure, though it can also result from autoimmune diseases (like lupus), polycystic kidney disease, or repeated kidney infections.

CKD is staged 1 through 5 based on estimated glomerular filtration rate (eGFR), with stage 5 representing kidney failure requiring dialysis or transplant. Early detection and management can significantly slow progression, and many people with early-stage CKD never progress to kidney failure with proper care.

Symptoms

Often no symptoms in early stages (stages 1-3) — this is why screening matters
Fatigue and weakness
Swelling in legs, ankles, or around the eyes
Foamy or bubbly urine (a sign of protein loss)
Changes in urination frequency or amount
Persistent itching
Muscle cramps
Nausea and loss of appetite
Difficulty concentrating
High blood pressure (can be both a cause and a symptom)
Anemia-related fatigue in later stages

Diagnosis

Blood test — creatinine and eGFR (estimated glomerular filtration rate) — the primary marker of kidney function. eGFR below 60 for 3+ months indicates CKD.
Urine test — albumin-to-creatinine ratio (ACR) — detects protein leaking into urine, an early sign of kidney damage even with normal eGFR
Blood pressure measurement — hypertension both causes and results from CKD
Imaging — renal ultrasound to assess kidney size and structure, and rule out obstruction
Additional testing — depending on suspected cause: diabetes screening, autoimmune panels, or kidney biopsy in select cases

A nephrologist manages CKD, particularly stage 3 or higher, or when the cause is unclear.

Treatments

There's no cure for CKD, but progression can often be significantly slowed:

Blood pressure control — ACE inhibitors or ARBs are preferred, as they also protect the kidneys directly, not just lower blood pressure
Blood sugar control — critical for diabetic patients, since diabetes is the leading cause of CKD
SGLT2 inhibitors — a newer class of medication (originally for diabetes) shown to significantly slow CKD progression even in non-diabetic patients
Dietary management — working with a renal dietitian on sodium, potassium, phosphorus, and protein intake, which becomes more restrictive as CKD advances
Avoiding nephrotoxic substances — NSAIDs (ibuprofen, naproxen), certain contrast dyes, and some supplements can worsen kidney function and should be used cautiously or avoided
Anemia management — erythropoiesis-stimulating agents and iron supplementation as needed in later stages
Bone health management — phosphate binders and vitamin D analogs as kidney function declines
Dialysis or transplant — for stage 5 (kidney failure); transplant evaluation should begin proactively before dialysis becomes necessary when possible

Medical Resources

Your Care Plan

A step-by-step guide to navigating your condition, from finding the right doctors to advocating for the care you deserve.

Step 1: Doctors to See

Start with: Your primary care physician for eGFR and urine ACR screening, especially if you have diabetes, high blood pressure, or a family history.

Then seek: A nephrologist, particularly for stage 3b or higher CKD, rapidly declining function, or unclear cause.

Build your team:

Renal dietitian — essential as CKD advances, for managing sodium, potassium, phosphorus, and protein intake
Cardiologist — CKD significantly increases cardiovascular risk and the two are closely monitored together
Endocrinologist — if diabetes is the underlying cause
Transplant team — proactive evaluation before dialysis is needed, if transplant is a potential option

Step 2: Advocate for Yourself

Ask your doctor for your actual eGFR and ACR numbers, not just "your kidneys are fine" — knowing your specific stage and trend over time matters for catching decline early. If you have diabetes or high blood pressure, ask specifically about kidney-protective medications (ACE inhibitors/ARBs, SGLT2 inhibitors) rather than blood pressure or sugar control alone — these have specific kidney benefits beyond their other effects. Avoid regular NSAID use (ibuprofen, naproxen) if you have any reduced kidney function — ask your doctor for safer alternatives for pain. If you're approaching more advanced CKD stages, ask proactively about transplant evaluation timing — starting this process before dialysis becomes necessary can shorten wait times significantly.

Step 3: Your Action Plan

Get baseline eGFR and urine ACR testing, especially if you have diabetes, hypertension, or a family history of kidney disease.
If CKD is identified, ask for your specific stage and the suspected underlying cause.
See a nephrologist for stage 3b or higher, or if the cause is unclear.
Optimize blood pressure and blood sugar control with kidney-protective medications specifically.
Meet with a renal dietitian to adjust your diet as needed for your stage.
Avoid NSAIDs and other nephrotoxic substances — ask your doctor for a list specific to your situation.
Get monitored regularly — repeat eGFR and ACR testing on a schedule your nephrologist recommends.
If approaching advanced stages, start transplant evaluation proactively rather than waiting for dialysis to become necessary.

Important: This report is educational information, not medical advice. Always consult a qualified healthcare professional for diagnosis and treatment decisions.