Diabetes and Neuropathy: Warning Signs and When to See a Doctor
Updated 2026-10-08 · Green Remedies Research Editorial Team
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If you have diabetes and your feet have started to tingle, burn or go numb, this page is for you. It explains, in plain language, how diabetes affects nerves, which signs matter, what a doctor may check and which symptoms need prompt care. It is general information from public health sources, not a substitute for your own care team.
Please do not wait. Nerve symptoms with diabetes are a reason to book a visit, not to experiment with supplements first. Early care helps prevent complications such as foot ulcers.
How does diabetes damage nerves?
According to the NIDDK, over time high blood glucose and high levels of fats such as triglycerides can damage nerves. The NIDDK estimates that one-third to one-half of people with diabetes have peripheral neuropathy. It usually starts in the feet and legs and can later affect the hands and arms.
What types of diabetic neuropathy are there?
The NIDDK describes four main types:
| Type | What it affects |
|---|---|
| Peripheral | Feet and legs first, sometimes hands and arms. The most common type |
| Autonomic | Nerves that control internal organs: heart rate, blood pressure, digestion, bladder, sexual function, sweating |
| Focal | A single nerve, often in the hand (carpal tunnel syndrome is common), head, torso or leg |
| Proximal | Rare; affects the hip, buttock or thigh, usually on one side |
What are the early signs of diabetic neuropathy in the feet?
MedlinePlus describes symptoms that often start in the toes and feet:
- Tingling or "pins and needles"
- Burning, especially at night
- Numbness or reduced ability to feel pain or temperature
- Feeling as if you are wearing socks when you are not
- Poor balance or new clumsiness
- Muscle weakness or cramps
Because numbness can hide injuries, some people first notice neuropathy when they find a blister or cut they never felt.
Can neuropathy affect more than the feet?
Yes. MedlinePlus lists symptoms that come from autonomic nerve damage, including bloating or trouble swallowing, dizziness when standing up, bladder problems, sexual problems, abnormal sweating and difficulty noticing low blood sugar. That last one is especially important for people on insulin.
What tests might a doctor order?
According to MedlinePlus, a doctor may use:
- A physical exam, including checks of reflexes, feeling and vibration sense in the feet
- Blood and urine tests (for example, blood sugar, kidney function and vitamin B12)
- Nerve conduction studies, which measure how fast signals travel
- Electromyography, which records electrical activity in muscles
- In some cases, a nerve or skin biopsy
Testing also rules out other causes. Diabetes is common, but neuropathy can also come from low vitamins, thyroid problems, alcohol, medicines and more.
When should you see a doctor about nerve symptoms?
Book a routine appointment if you notice any new tingling, burning, numbness or weakness. MedlinePlus says early treatment improves the chances of controlling symptoms and preventing complications.
Seek care promptly (same day or urgent care) if you have:
- A foot wound, blister or sore that is red, swollen, warm, draining or not healing
- Sudden weakness in a leg or arm, or symptoms spreading quickly
- New loss of balance or falls
- Changes in bladder or bowel control
- Signs of very low blood sugar you did not feel coming
Call 911 for chest pain, trouble breathing or signs of stroke.
How is diabetic neuropathy managed?
MedlinePlus and the NIDDK describe a combination of steps:
- Keeping blood glucose in your target range, with your care team
- Daily foot care and regular professional foot exams
- Pain treatment when needed, which can include prescription medicines or topical agents chosen by your doctor
- Physical therapy for balance and strength
- Treating related problems such as digestive or bladder symptoms
Supplements are not part of standard treatment. The NCCIH stresses that people should never replace medical treatment for diabetes with an unproven product.
How should you care for your feet every day?
The NIDDK foot care page recommends habits like these:
- Check your feet every day for cuts, blisters, redness or swelling. Use a mirror or ask for help.
- Wash and dry your feet carefully, including between the toes.
- Keep skin moisturized, but not between the toes.
- Wear shoes and socks that fit; avoid going barefoot.
- Test bath water with your elbow, not your feet.
- Have your feet checked at every diabetes visit.
Should you take a supplement for diabetic neuropathy?
Only with your doctor's input. A few points to bring to that conversation:
- If you take metformin, ask about vitamin B12. The ODS notes long-term metformin use is associated with lower B12 levels.
- Some supplements, such as cordyceps mushroom, may lower blood sugar, which can matter alongside diabetes medicines (see our NervoLink review).
- Products that hide their ingredients cannot be checked for interactions (see our NerveRevive 360 page).
Our guide to choosing a nerve supplement includes a label checklist you can take to your appointment, and our vitamins for nerve health guide explains the nutrients doctors test most.
How do you prepare for a neuropathy appointment?
A little preparation makes a short visit more useful:
- Write a symptom timeline: when it started, which parts of the body, whether it is worse at night, and what makes it better or worse.
- List every medicine and supplement, with doses. Bring bottles if that is easier.
- Bring recent numbers: home glucose readings or your latest A1C if you have them.
- Note any falls, foot wounds or burns you did not feel.
- Wear or bring socks and shoes you can remove easily for a foot exam.
If you are considering a supplement such as NeuroGenica or NerveCell, bring a printout or photo of its ingredient list.
What questions should you ask your doctor?
- What is most likely causing my symptoms?
- Should my B12, thyroid or kidney function be tested?
- Is my blood sugar target right for protecting my nerves?
- How often should my feet be examined?
- Is any supplement I am considering safe with my medicines?
Where can you read more?
- NIDDK: Diabetic neuropathy
- MedlinePlus: Diabetic nerve problems
- MedlinePlus: Peripheral neuropathy
Sources consulted: niddk.nih.gov, medlineplus.gov, nccih.nih.gov, ods.od.nih.gov.
Frequently asked questions
How common is neuropathy in people with diabetes?
The NIDDK estimates that one-third to one-half of people with diabetes have peripheral neuropathy.
Can diabetic neuropathy be cured with supplements?
No. No supplement is approved to treat or cure diabetic neuropathy. Management focuses on blood glucose control, foot care and medical treatment of symptoms.
Why is foot care so important with neuropathy?
Numb feet may not feel cuts or blisters, which can turn into serious infections. The NIDDK recommends checking your feet every day.