🫘 Men's Health
Diabetic Nephropathy — Kidney Damage from Diabetes
How diabetes damages your kidneys — and how to slow or stop it
Diabetic nephropathy is kidney damage caused by diabetes — specifically by chronic high blood sugar and high blood pressure damaging the delicate filtering units (glomeruli) of the kidneys. It is the leading cause of chronic kidney disease (CKD) and end-stage renal disease (ESRD) requiring dialysis globally — and is rapidly becoming the most important cause in Nigeria as type 2 diabetes prevalence rises. The tragedy is that diabetic nephropathy progresses silently for years — with no symptoms until 60–70% of kidney function is lost. With early detection and treatment, progression can be halted or dramatically slowed.
Signs and Symptoms
✓ Early (microalbuminuria stage): NO SYMPTOMS — detected only by urine albumin test
✓ Intermediate: Frothy urine (protein in urine — proteinuria), mild ankle oedema
✓ Advanced: Significant ankle and leg oedema, breathlessness (fluid in lungs), fatigue, anaemia
✓ End stage: Symptoms of CKD stage 4–5: nausea, vomiting, confusion, severe breathlessness, requiring dialysis
When to Seek Help
Annual urine albumin-creatinine ratio (ACR) for all diabeticsFrom diagnosis in type 2 diabetes. After 5 years in type 1 diabetes. Earlier if other risk factors
ACR > 3 mg/mmol (microalbuminuria) on two testsStart ACE inhibitor or ARB even if blood pressure is normal — specific renoprotective effect
eGFR falling more than 5 mL/min/yearAccelerated CKD progression — urgently review and optimise all modifiable factors
eGFR < 30 mL/min (CKD stage 4)Nephrology referral — preparation for renal replacement therapy, dietary modification, anaemia management
Any nephrotoxic exposure (contrast dye, aminoglycosides, NSAIDs) in a diabeticEnsure pre-hydration and close renal monitoring
Tests & Diagnosis
🧪 Urine albumin-creatinine ratio (ACR)
The most sensitive early marker. Normal < 3. Microalbuminuria 3–30 (early nephropathy). Macroalbuminuria > 30 (established nephropathy). Done on first-morning urine. Confirm on two out of three tests (exercise, infection, fever cause transient false positives)
🧪 eGFR (from serum creatinine)
Monitors CKD progression. Check every 6–12 months in diabetics with any CKD
🧪 Blood pressure
At every diabetes visit — target < 130/80 mmHg in diabetics with nephropathy
🧪 HbA1c
Every 3 months if poorly controlled — blood sugar is the primary driver of nephropathy
🧪 Potassium
ACE inhibitors and ARBs raise potassium — monitor regularly especially with CKD
🧪 Full blood count
Anaemia of CKD — haemoglobin often < 10g/dL in CKD stage 3–4
Frequently Asked Questions
How do I know if my kidneys are being damaged by diabetes?
You usually can't feel it until very late — which is why annual urine and blood tests are non-negotiable for all diabetics. Ask for your urine albumin-creatinine ratio (ACR) and eGFR at every diabetes review. These two numbers tell you where your kidneys are and how fast they are declining.
Can diabetic kidney disease be reversed?
In very early stages (microalbuminuria), excellent blood sugar and blood pressure control can normalise the urine albumin and slow or reverse early damage. Once proteinuria is established (macroalbuminuria) or eGFR is significantly reduced, reversal is unlikely — but progression can be dramatically slowed with treatment. This is why early detection and treatment matter enormously.
My diabetes is controlled but my kidneys are still getting worse — why?
Blood sugar is one of two main drivers — blood pressure is the other and is equally important. Even well-controlled blood sugar without blood pressure control allows nephropathy to progress. Also, some genetic factors drive progression. Ensure blood pressure is < 130/80 mmHg, you are on an ACE inhibitor or ARB, and there are no other nephrotoxic exposures.
What happens when the kidneys fail from diabetes?
Without dialysis or transplant, kidney failure is fatal — uremic toxins accumulate and cause multi-organ failure. Haemodialysis (available at most Nigerian teaching hospitals and many private hospitals) is life-sustaining — patients attend 3 times per week for 4-hour sessions. The cost is a major burden in Nigeria (₦150,000–₦300,000 per month). This is why nephropathy prevention is the most important investment.