Peripheral neuropathy: numbness, tingling and nerve pain in the hands and feet
Numbness, tingling and burning pain that start in the feet and creep up the legs, often in a symmetrical "stocking" pattern, are the hallmark of peripheral neuropathy: damage to the nerves that carry sensation. By far the commonest cause is diabetes or prediabetes, followed by B12 deficiency, heavy alcohol use, thyroid disease and some chemotherapy drugs; in a large minority no cause is found. Early diabetic and B12 cases matter most because they are the ones you can sometimes slow or partly reverse, so the first job is to find and treat the cause, not just mute the pain.
Key facts
- Peripheral neuropathy affects roughly 2 to 3 percent of the general population, rising to around 8 percent in people over 55.1
- Diabetes is the single biggest cause: it damages nerves in about 25 to 50 percent of people who have it, and accounts for around a third of all neuropathy seen in clinic.2
- Between a quarter and a half of cases are labelled "idiopathic" (no cause found), but a large share of these turn out to be linked to prediabetes (impaired glucose tolerance).2
- In type 1 diabetes, tight glucose control cut the risk of nerve damage by about 60 percent in the landmark DCCT trial, and the benefit was still measurable over a decade later.3
What peripheral neuropathy actually is
Your peripheral nerves run from the spinal cord to the skin, muscles and organs. The longest fibres reach your toes, which is why they fail first: damage shows up as numbness, tingling (paraesthesia) or burning in both feet, then climbs to the calves and hands, the classic "glove and stocking" pattern. Some people feel a numb, walking-on-cotton-wool loss of sensation; others have the opposite, spontaneous burning or stabbing pain and skin that hurts to a bedsheet, sometimes with poor balance and weak feet.4 Two problems often coexist and are managed differently: the loss of protective sensation, which is dangerous, and the nerve pain, which is distressing.
The common causes, in order
Most peripheral neuropathy comes down to a short list. Getting the cause right matters because the treatable ones, caught early, behave very differently from the rest.
| Cause | Roughly how common | Can it be slowed or reversed? |
|---|---|---|
| Diabetes and prediabetes | The biggest single cause; nerve damage in 25 to 50 percent of people with diabetes2 | Yes if caught early: glucose control slows progression, especially in type 13 |
| Vitamin B12 deficiency | Common and important, often missed5 | Yes if treated early; can become permanent if left5 |
| Excess alcohol | The second commonest cause of this pattern6 | Partly: cutting down plus correcting nutrition can help |
| Underactive thyroid | Less common but easily checked4 | Often, once thyroid hormone is replaced |
| Chemotherapy and some drugs | A recognised side effect of several cancer drugs | Sometimes improves after treatment, but can persist |
| Idiopathic (no cause found) | A quarter to nearly half of cases2 | Variable; a hidden prediabetes is often the explanation2 |
Other causes include kidney disease, autoimmune conditions, inherited neuropathies and infections, but the list above covers most cases. Alcohol matters because it both damages nerves directly and depletes B vitamins, and in people who also have diabetes it is regularly overlooked as an accelerant.6
Why early diabetic and B12 cases matter most
Established nerve damage is often permanent: once long axons degenerate, they regenerate slowly and incompletely, which is why the early window matters. In the Diabetes Control and Complications Trial (DCCT) in type 1 diabetes, intensive glucose control reduced clinical neuropathy by around 60 percent versus standard care, and the EDIC follow-up showed the benefit persisted for well over a decade.3 The signal is weaker in type 2 diabetes, where glucose control alone does less and blood pressure, lipids, weight and smoking matter too.7
B12 deficiency tells a similar story. B12 maintains the myelin sheath that insulates nerves, so a shortage can damage the peripheral nerves and the spinal cord. Caught early, replacement can halt and partly reverse symptoms; left for months, the damage becomes permanent. Because the standard blood test is imperfect and a normal full blood count does not rule deficiency out, B12 is one of the most important things to check, and treat promptly, in anyone with new numbness. We cover the testing pitfalls in our guide to B12 and folate deficiency.
Evidence note: the strongest reversibility data come from type 1 diabetes (DCCT and EDIC). The take-home is not that nerve pain vanishes once sugar is controlled, but that early, sustained control changes the trajectory. Treating the cause and treating the pain are separate jobs, and you usually need both.
What tests help
The aim is to confirm a peripheral neuropathy and hunt for treatable causes; a GP can do most of it, since the examination, including testing sensation in the feet, tells much of the story and nerve conduction studies are reserved for unclear cases. The core bloods are:
- Blood glucose and HbA1c, for diabetes or prediabetes, the likeliest cause. A fasting glucose or glucose tolerance test may be added, because impaired glucose tolerance can be missed by HbA1c alone.2
- Vitamin B12 and folate: read a borderline B12 against active B12 or methylmalonic acid, not a single "in range" number.5
- Thyroid function (TSH), since an underactive thyroid is a reversible cause.4
- Full blood count, kidney and liver function, to pick up anaemia, kidney disease and the effects of alcohol.
If the screen is clear and the pattern typical, "idiopathic" is reasonable, but a substantial share of such cases is really early prediabetes, so glucose deserves a careful look.2 To make sense of several borderline results at once, our stack builder can help you lay them out.
Evidence-based options for nerve pain, and the honest limits
Neuropathic pain does not respond to ordinary painkillers like paracetamol or ibuprofen the way other pain does. For persistent nerve pain (outside trigeminal neuralgia), NICE recommends a choice of four first-line drugs, amitriptyline, duloxetine, gabapentin or pregabalin; if the first does not work or is not tolerated you switch to another, and can switch again.8 Duloxetine has a particular evidence base in diabetic neuropathy. All are started low and increased slowly (titrated) to balance benefit against side effects such as drowsiness, dizziness and, with amitriptyline, dry mouth and constipation.
The honest limit is that none is a cure and the average benefit is modest: in trials only a minority get a large reduction from any single drug, and side effects often cap the dose, so the realistic goal is meaningful relief and better sleep, not zero pain. NICE advises tramadol only as short-term rescue, and capsaicin cream for localised pain in people who want to avoid tablets; strong opioids, cannabis extract and several other drugs are explicitly not recommended for routine use in primary care.8
Safety and off-label note: gabapentin and pregabalin are controlled drugs in the UK because of dependence and misuse risk, and the dose must be reduced if your kidneys are impaired. Amitriptyline for nerve pain is used below its antidepressant dose and is off-label for this purpose. Alpha-lipoic acid is a supplement, not a licensed treatment, and does not replace medical management.
Of the supplements, alpha-lipoic acid (ALA) has the most credible evidence in diabetic neuropathy: meta-analyses suggest intravenous ALA at 600 mg daily for three weeks gives a clinically relevant reduction in symptoms, while the case for oral ALA is weaker and the evidence outside diabetes is thin.9 It is a reasonable add-on to discuss, not a replacement for glucose control or first-line medication.
Foot care: the part people underestimate
When sensation is reduced, the danger is no longer just pain, it is the injuries you cannot feel: a blister, a stone in the shoe or a hot bath can do damage that goes unnoticed and progresses to an ulcer. This is why NICE recommends everyone with diabetes has a structured foot check at least yearly, including testing sensation with a 10 gram monofilament and checking foot pulses, more often for those at higher risk.10 Day to day, the basics prevent harm:
- Check your feet daily, including the soles and between the toes, using a mirror if needed.
- Test bath water with your elbow, not your feet, and never walk barefoot.
- Trim toenails straight across, moisturise dry skin, and check inside shoes for grit.
- Treat any cut, blister or broken skin seriously and seek help early if it is not healing.
When numbness or weakness is urgent
Most peripheral neuropathy develops slowly over months and is a "see your GP" situation. A few patterns are emergencies: call 999 or go to A&E for these, and use NHS 111 if you are unsure how serious symptoms are.
- Rapidly spreading weakness or numbness, especially if it climbs from the feet upwards over hours to days, or affects breathing or swallowing: this can be Guillain-Barre syndrome, a medical emergency.11
- Sudden weakness or loss of bladder or bowel control, particularly with back pain and numbness around the saddle area: this needs emergency assessment.
- A foot ulcer, spreading redness, or a foot that is hot, swollen or changing shape in someone with diabetes: contact your foot protection or diabetes team urgently.10
- Can we check the treatable causes: glucose or HbA1c, B12 and folate, and thyroid function?
- My B12 is "in range" but I have numbness: can we look at active B12 or methylmalonic acid first?
- If it is diabetic neuropathy, can we manage glucose, blood pressure and lipids together, not just sugar?
- For the pain, can we try a NICE first-line option and review the dose properly before deciding it has failed?
- Am I due a foot check, and what is my risk level for a foot ulcer?
References
- Hammi C, Yeung B. Neuropathy. StatPearls. NCBI Bookshelf, 2023. ncbi.nlm.nih.gov.
- Doughty CT, Seyedsadjadi R. Peripheral Neuropathy: Evaluation and Differential Diagnosis. Am Fam Physician. 2020;102(12):732-739. aafp.org.
- Martin CL, Albers JW, Pop-Busui R; DCCT/EDIC Research Group. Neuropathy and related findings in the DCCT/EDIC study. Diabetes Care. 2014;37(1):31-38. PMC3867989.
- NHS. Peripheral neuropathy: causes. 2022. nhs.uk.
- National Institute for Health and Care Excellence. Vitamin B12 deficiency in over 16s: diagnosis and management. NICE guideline NG239, 2024. nice.org.uk.
- Tesfaye S, et al. Alcohol consumption as a causator and/or accelerator of neuropathy in people with diabetes is regularly overlooked. J Diabetes Investig. 2021. PMC8478988.
- Pop-Busui R, Boulton AJM, Feldman EL, et al. Diabetic Neuropathy: A Position Statement by the American Diabetes Association. Diabetes Care. 2017;40(1):136-154. diabetesjournals.org.
- National Institute for Health and Care Excellence. Neuropathic pain in adults: pharmacological management in non-specialist settings. NICE guideline CG173, 2013 (updated 2020). nice.org.uk.
- Mijnhout GS, Kollen BJ, Alkhalaf A, et al. Alpha lipoic acid for symptomatic peripheral neuropathy in patients with diabetes: a meta-analysis of randomized controlled trials. Int J Endocrinol. 2012;2012:456279. PMC3272801.
- National Institute for Health and Care Excellence. Diabetic foot problems: prevention and management. NICE guideline NG19, 2015 (updated 2019). nice.org.uk.
- NHS. Guillain-Barre syndrome. 2023. nhs.uk.
This article is educational and does not constitute medical advice, diagnosis, or a treatment recommendation. Medication uses described as “off-label” are not licensed for that purpose in the UK and should only be considered under qualified clinical supervision. Always speak to your GP, pharmacist, or a registered specialist before starting, stopping, or changing any treatment. If you have severe or alarm symptoms - unintentional weight loss, blood in your stool, difficulty swallowing, persistent vomiting, a fever, or severe pain - seek urgent medical care.