🏥 Mascot Healthcare — LagosWhatsApp Us
⚡ Men's Health

Peripheral Neuropathy — Diabetes and Nerve Damage

Understanding and managing nerve damage from diabetes and other causes in Nigeria

Peripheral neuropathy is damage to the peripheral nerves — those outside the brain and spinal cord — causing pain, numbness, tingling, and weakness in the hands and feet. Diabetes is the most common cause globally and in Nigeria, where it affects approximately 30–50% of diabetics. Other important causes in Nigeria include HIV (both the virus and ARV medications), vitamin B12 deficiency, alcohol, leprosy, and hereditary neuropathies. The consequences range from uncomfortable tingling to complete loss of protective sensation (enabling diabetic foot ulcers) and severe neuropathic pain that significantly impairs quality of life.

Signs and Symptoms

✓ Sensory neuropathy (most common): numbness, tingling (pins and needles), burning pain in feet and legs — 'stocking distribution' (like wearing stockings). Starts in toes, gradually extends upwards
✓ Neuropathic pain: burning, stabbing, shooting, electric shock-like pain — typically worse at night
✓ Loss of protective sensation: cannot feel injury, heat, or pain in feet — leads to diabetic foot ulcers
✓ Motor neuropathy: muscle weakness, foot drop, difficulty with fine motor tasks
✓ Autonomic neuropathy: postural hypotension (dizziness on standing), erectile dysfunction, gastroparesis (delayed gastric emptying — bloating, nausea, unpredictable blood sugars), sweating abnormalities, bladder dysfunction

Risk Factors

When to Seek Help

Rapidly ascending weakness (Guillain-Barré)Leg weakness progressing upward over hours to days, especially after recent infection — respiratory failure may follow. Emergency neurological assessment and ICU-level care
Sudden onset of foot drop or hand weaknessMononeuropathy — may indicate nerve compression, vasculitis, or other treatable cause
Loss of protective sensation in a diabetic's feetAnnual monofilament test. If lost: intensive foot care education, footwear advice, podiatry referral
Neuropathic pain significantly affecting sleep or daily functionPharmacological treatment — multiple effective options available
Autonomic symptoms in a diabeticPostural hypotension, gastroparesis, bladder dysfunction — specialist assessment and management

Tests & Diagnosis

🧪 Nerve conduction study (NCS) and EMG
The definitive investigation — measures conduction velocity and amplitude of peripheral nerves. Available at neurology departments in Nigerian teaching hospitals. Identifies type (axonal vs demyelinating), severity, and distribution
🧪 10g monofilament and vibration testing
Bedside screening for loss of protective sensation in diabetics — simple and essential
🧪 Blood tests
Glucose and HbA1c (diabetes), vitamin B12, folate, thyroid function, FBC (anaemia), LFTs (alcohol), HIV, VDRL (syphilis), serum protein electrophoresis (paraprotein)
🧪 Nerve biopsy
Rarely needed — for diagnosis of vasculitic neuropathy, amyloid, or rare hereditary neuropathies

Treatment Options

1
Treat the underlying cause
Optimise blood sugar (HbA1c < 7%) in diabetics — prevents progression, may partially improve early neuropathy. Vitamin B12 injection for deficiency. ARV regimen change if stavudine (d4T) remaining. Alcohol cessation. Antileprosy therapy
2
Neuropathic pain — pharmacotherapy
Amitriptyline 25–75mg at night — effective, cheap, widely available. Gabapentin 300mg TDS — effective, increasingly available. Pregabalin 75–150mg BD. Duloxetine 60mg daily — if tolerated. Tramadol/opioids for severe pain — second-line, use cautiously
3
Topical treatments for focal neuropathic pain
Capsaicin cream 0.075% — reduces pain by depleting substance P. Lidocaine patches — not widely available in Nigeria
4
Physical measures
Transcutaneous electrical nerve stimulation (TENS) — reduces pain in some patients. Protective footwear and foot care for sensory loss
5
Autonomic neuropathy management
Orthostatic hypotension: fludrocortisone, midodrine, compression stockings. Gastroparesis: metoclopramide, domperidone, small frequent meals, low-fat diet. Bladder dysfunction: intermittent self-catheterisation
6
Painful diabetic neuropathy — combination therapy
Amitriptyline + gabapentin combination is more effective than either alone and allows lower doses of each

Frequently Asked Questions

Can diabetic neuropathy be reversed?
Once established, structural nerve damage is largely irreversible. However, very early neuropathy (abnormal nerve conduction without symptoms) can improve with excellent blood sugar control. Pain symptoms can improve significantly with pharmacological treatment even when nerve damage persists. Preventing neuropathy from developing (through tight glucose control from early in diabetes) is far more effective than treating established neuropathy.
Is the pain of diabetic neuropathy treated with painkillers?
Standard painkillers (paracetamol, NSAIDs, codeine) are generally poorly effective for neuropathic pain — this is a fundamentally different type of pain involving central sensitisation. Neuropathic pain responds better to amitriptyline, gabapentin, or pregabalin — drugs that work on nerve pain pathways. These are not addictive in the way opioids are and can dramatically improve quality of life.
My feet are numb but painless — is this less serious than neuropathic pain?
Actually, painless numbness is in many ways more dangerous than neuropathic pain — it means you have lost your protective pain sensation. You cannot feel injuries, burns, or pressure damage to your feet. This leads directly to diabetic foot ulcers and amputation. Painless neuropathy requires the most careful foot protection and monitoring.
Is there a connection between HIV medication and nerve damage?
Yes — stavudine (d4T), which was widely used in Nigeria's early ARV rollout, causes severe peripheral neuropathy. It has been replaced in Nigeria's national guidelines with tenofovir (TDF), which does not cause neuropathy. If you developed neuropathy while on d4T, your regimen should have been changed — check with your HIV clinic. The neuropathy may partially improve after switching but does not always resolve completely.

Related Pages

Hypoglycaemia — Low Blood Sugar EmergenciesDiabetic Retinopathy — Eye Complications of DiabetesDiabetic Ketoacidosis (DKA) — Recognising a CrisisDiabetic Foot Care Nigeria — Preventing Amputation

Ready to speak to a doctor?

Confidential, judgement-free consultations — book online or via WhatsApp.

💬 Book on WhatsApp