Peripheral neuropathy means damage to the nerves outside the brain and spinal cord — most often felt first in the feet. It affects up to half of people with long-standing diabetes, but diabetes is far from the only cause, and finding the exact cause is what makes treatment work.
What is peripheral neuropathy?
The longest nerves are affected first, which is why symptoms start in the toes and soles ("stocking" pattern) and may later involve the hands ("glove" pattern). Damage can affect sensory, motor, or autonomic fibres.
Common symptoms
- Burning, tingling, or "pins and needles" in the feet, worse at night
- Numbness — like walking on cotton
- Unsteadiness in the dark or on uneven ground
- Night-time hand numbness that wakes you (carpal tunnel)
- Weakness climbing stairs or gripping (later, or in inflammatory types)
Risk factors and causes
- Diabetes and pre-diabetes (the most common)
- Vitamin B12 deficiency, thyroid disease, kidney disease
- Alcohol, chemotherapy, and some medications
- Immune causes: GBS (rapid — an emergency) and CIDP (progressive)
How is it diagnosed?
Nerve conduction studies and EMG localise and grade the damage and separate axonal from demyelinating types — a distinction that changes everything. Targeted blood tests (glucose, HbA1c, B12, thyroid, immune screen) find the cause; lumbar puncture supports inflammatory diagnoses.
Treatment options
Treating the cause protects the nerves: glycemic control, B12 replacement, thyroid correction, or immunotherapy (IVIG, plasma exchange, steroids) for inflammatory neuropathies. Evidence-based medications calm neuropathic pain; ordinary painkillers usually do not help.
Natural ways to help
Tight glucose control, a balanced diet, avoiding alcohol, daily foot inspection and proper footwear, and balance exercises to prevent falls.
When should you see a neurologist?
For any persistent numbness, burning, or tingling; unsteadiness; or rapidly progressive weakness — the latter urgently.
Emergency warning signs: weakness spreading upward over hours to days, difficulty breathing or swallowing after limb weakness (possible GBS) — go to the emergency department immediately.
Key takeaways
- Neuropathy has a findable cause in most patients.
- Diabetes is the commonest cause — but never assume it is the only one.
- NCS/EMG is the key test and is well tolerated.
- Nerve pain needs nerve-specific medication.
- Rapidly ascending weakness is an emergency.
References
American Academy of Neurology. (2022). Painful diabetic neuropathy guideline. https://www.aan.com National Institute of Neurological Disorders and Stroke. (2024). Peripheral neuropathy fact sheet. Mayo Clinic. (2024). Peripheral neuropathy. https://www.mayoclinic.org