Peripheral neuropathy: the numbness and burning in hands and feet
Last updated September 3, 2026.
Peripheral neuropathy is damage to the nerves carrying signals between the spinal cord and the body, and it usually announces itself in the feet first: numbness, tingling, burning, or pain in a sock-and-glove pattern. It has many causes, diabetes is by far the most common, and while damaged nerves rarely recover fully, finding and treating the cause stops most cases from progressing.
What does it feel like?
The classic pattern starts in the toes and creeps upward: numbness, pins and needles, burning or stabbing pain, heightened sensitivity to touch (bed sheets hurt), and loss of balance, especially in the dark. Weakness in the feet (tripping, foot drop) and loss of position sense follow as it progresses. Autonomic nerves can be involved too: dizziness on standing, bowel and bladder changes, abnormal sweating. Symptoms are usually worst at night.
What causes it?
Diabetes causes about a third of cases in developed countries; years of high blood sugar injure small nerve fibers. Other causes: excess alcohol, B12 deficiency, chemotherapy drugs, underactive thyroid, kidney disease, infections (shingles, HIV, Lyme), autoimmune conditions, and inherited forms. A substantial share stays idiopathic: no cause found despite a full workup. The cause matters because several are treatable, and treating them halts the march.
What actually helps?
- Treat the driver: tight glucose control in diabetes, stopping alcohol, replacing B12, treating the thyroid; this is where progression is won or lost.
- Nerve-pain medication: ordinary painkillers do little; the effective drugs are amitriptyline, duloxetine, gabapentin, or pregabalin, titrated slowly.
- Topical options: capsaicin cream or high-dose patches and lidocaine plasters for localized burning areas.
- Foot protection: numb feet get injured without feeling it: daily foot checks, never barefoot, well-fitting shoes, and professional nail care. A painless foot ulcer in a neuropathic foot is a serious problem, not a trivial one.
- Physical stability: balance exercises, good lighting at night, handrails, and removing trip hazards cut the fall risk that numb feet create.
When is it an emergency?
Gradual neuropathy is not, but some nerve problems are: sudden weakness progressing upward over days, numbness with loss of bladder or bowel control, numbness around the saddle area with back pain, or rapidly progressing weakness with breathing difficulty all need emergency assessment. A painless, red, warm, or broken area on a numb foot needs same-week (and if infected, same-day) review. Pymander's escalation routing is built and tested specifically for this class of decision; see the safety architecture working paper.
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Common questions
Can damaged nerves heal?
Partially, and slowly. Nerves regenerate at roughly a millimetre a day when the cause is removed, so a treatable cause (B12 deficiency, alcohol, thyroid) addressed early can bring real recovery over months. Diabetic neuropathy is different: established damage is largely permanent, and the goal becomes stopping progression through glucose control. Pain can be well controlled even when numbness persists. The earlier the cause is found and treated, the more nerve is saved.
Why do ordinary painkillers not touch nerve pain?
Nerve pain comes from misfiring damaged nerves, not from inflammation or tissue injury, so paracetamol and ibuprofen have little to work on. The drugs that do work calm the misfiring itself: amitriptyline and duloxetine (originally antidepressants, used here at pain doses), and gabapentin or pregabalin. They are started low and increased slowly, take two to six weeks to show their effect, and help about half of patients substantially. Finding the right one sometimes takes two or three tries.
What tests will I need?
Usually: blood tests covering the common causes (glucose or HbA1c, B12, thyroid, kidney function, sometimes protein electrophoresis), a clinical examination of sensation, reflexes, and strength, and sometimes nerve conduction studies, which measure how fast nerves carry signals and confirm the diagnosis and its severity. Most people get answers from bloods plus examination; conduction studies and further tests are for unclear, severe, or atypical cases.
How do I look after numb feet?
The routine that prevents amputations: check both feet daily for cuts, blisters, redness, or swelling (use a mirror for the soles); wash and dry carefully, especially between toes; moisturize dry skin but not between toes; never walk barefoot, even indoors; check shoes for stones or rough seams before putting them on; have nails cut professionally if you cannot see or reach safely; and never use hot water bottles or electric blankets on numb feet, because burns happen without warning pain.
Is neuropathy only caused by diabetes?
No, diabetes is just the biggest contributor. Alcohol excess, B12 deficiency (common in vegans, older adults, and people on metformin or acid-blocking drugs), underactive thyroid, kidney failure, chemotherapy, and inherited conditions all cause it, and a third of cases stay unexplained after testing. This is why new neuropathy always earns a blood panel: several causes are fully treatable, and treating them changes the trajectory completely.
Will it keep getting worse?
That depends almost entirely on the cause and its control. Well-managed diabetic neuropathy often stabilizes; poorly controlled diabetes lets it climb steadily up the legs and into the hands. Treated B12 deficiency and stopped alcohol usually halt progression and often improve things. Idiopathic neuropathy tends to progress slowly. The realistic goal stated plainly: protect what nerve function remains, control the pain, protect the feet, and prevent falls.