Nerve Health · Guide
Peripheral Neuropathy: Symptoms and Causes
By PLACEHOLDER: Your Name · Updated July 2026
That numbness in your feet, the burning that shows up at night, the “pins and needles” that will not settle down: these are the classic signs of peripheral neuropathy. It is not a single disease but a symptom of damaged nerves, and the cause can range from something reversible like a vitamin deficiency to something serious like diabetes. Here is a clear, accurate guide to the symptoms, the main causes, and when you need to see a doctor.
Key takeaways
- Peripheral neuropathy is damage to the peripheral nerves, the ones that carry signals between your brain and spinal cord and the rest of your body.
- Common symptoms: tingling, numbness, burning or stabbing pain, sensitivity to touch, muscle weakness, and loss of balance, often starting in the feet and hands.
- Diabetes is the leading cause. Vitamin B12 deficiency and thyroid problems are important reversible causes worth ruling out.
- Because some causes are serious or treatable, a doctor should identify the underlying cause before you try to self-treat.
This is general information, not medical advice
Peripheral neuropathy can be a sign of a serious or reversible condition. Do not self-diagnose or rely on supplements alone. See a qualified healthcare provider to identify the cause with a physical exam and blood tests. This article is educational only.
What is peripheral neuropathy?
Your peripheral nervous system is the network of nerves that branches out from your brain and spinal cord to reach your skin, muscles, and organs. When those nerves are damaged, the signals they carry get scrambled, weakened, or lost. That is peripheral neuropathy.
Doctors group the peripheral nerves into three types, and the symptoms depend on which are affected:
- Sensory nerves carry sensations like touch, temperature, and pain. Damage here causes tingling, numbness, and burning.
- Motor nerves control muscle movement. Damage causes weakness, cramps, and muscle wasting.
- Autonomic nerves control automatic functions. Damage can affect blood pressure, digestion, sweating, and bladder control.
Neuropathy can involve one nerve, a few nerves, or many nerves at once. The most common pattern, polyneuropathy, affects many nerves and usually starts in the longest ones first, which is why symptoms so often begin in the feet.
Symptoms of peripheral neuropathy
Symptoms usually come on gradually, and the exact mix depends on which nerves are involved. The most frequently reported signs include:
- Tingling or “pins and needles” in the hands or feet
- Numbness or reduced ability to feel touch, temperature, or pain
- Burning, sharp, or stabbing pain, often worse at night
- Extreme sensitivity to touch, where even a bed sheet feels painful
- Muscle weakness or difficulty with fine movements like buttoning a shirt
- Loss of balance and coordination, especially in the dark
A hallmark of many polyneuropathies is a “stocking and glove” distribution: symptoms begin in the toes and feet, then over months or years spread upward, and may later appear in the fingers and hands in the same pattern.
What the autonomic symptoms look like
When neuropathy hits the autonomic nerves, the signs can be less obvious: dizziness or lightheadedness when standing up (from blood-pressure changes), digestive trouble like bloating or constipation, heat intolerance, or bladder problems. These are easy to miss as nerve-related, which is another reason a proper diagnosis matters.
If you are dealing with ongoing discomfort, our guide on how to relieve nerve pain naturally covers everyday steps that may help alongside medical treatment.
What causes peripheral neuropathy?
There are dozens of possible causes. These are the ones doctors see most often.
Diabetes
Diabetes is the single most common cause of peripheral neuropathy. Prolonged high blood sugar damages nerves and the small blood vessels that supply them, producing diabetic peripheral neuropathy. It typically starts in the feet, which is why foot care is such a central part of diabetes management.
Vitamin B12 deficiency
Vitamin B12 is essential for healthy nerves, and a deficiency is an important reversible cause. It is easy to test for and often straightforward to correct, which is exactly why a blood test matters before you assume the worst. Other nutrient issues, including B1, B6, and E, can play a role too. Our overview of the best vitamins for nerve health explains which ones have the strongest evidence.
Alcohol and toxins
Heavy, long-term alcohol use is a well-recognized cause, both through direct nerve toxicity and the poor nutrition that often accompanies it. Exposure to certain industrial chemicals and heavy metals can also damage nerves.
Medications and chemotherapy
Some prescription drugs cause neuropathy as a side effect. Chemotherapy is a notable example, and chemotherapy-induced peripheral neuropathy is a common reason cancer patients develop these symptoms.
Injury and nerve compression
Physical trauma, repetitive stress, or pressure on a nerve can cause localized neuropathy. Carpal tunnel syndrome, where the median nerve is compressed at the wrist, is one of the most familiar examples.
Autoimmune and inflammatory diseases
Conditions in which the immune system attacks the nerves or surrounding tissue can trigger neuropathy. These include Guillain-Barre syndrome, lupus, and rheumatoid arthritis.
Infections
Several infections can damage peripheral nerves, including shingles (from the chickenpox virus), Lyme disease, HIV, and hepatitis C.
Other medical conditions
Kidney disease and thyroid disorders can both cause neuropathy, and thyroid problems in particular are treatable once identified. Inherited conditions such as Charcot-Marie-Tooth disease run in families.
Idiopathic neuropathy
In a meaningful share of cases, no cause is ever found despite thorough testing. This is called idiopathic peripheral neuropathy.
Why diagnosis matters
It is tempting to look up symptoms and start taking a supplement, but with neuropathy that can be a mistake. Some causes are serious (like undiagnosed diabetes) and some are reversible (like B12 deficiency or a thyroid problem). Treating the wrong thing, or masking symptoms while the real cause progresses, can do real harm.
A doctor will typically take your history, examine your reflexes and sensation, and order blood tests to check for diabetes, vitamin levels, thyroid function, and kidney health. In some cases they add nerve conduction studies. Only once the cause is understood can treatment be targeted properly.
When to see a doctor
Book an appointment promptly if you notice new numbness, tingling, or weakness, if symptoms are spreading or getting worse, or if you have foot injuries you cannot feel (people with diabetes are at real risk of foot ulcers this way). Seek urgent care for sudden, severe, or rapidly worsening symptoms, or weakness that comes on quickly, as these can signal a serious problem.
Where supplements fit in
Here is the honest version: for some causes, certain vitamins and supplements may ease symptoms or support nerve health, and B vitamins in particular are relevant when a deficiency is part of the picture. But supplements do not replace diagnosing and treating the underlying cause. Think of them as a possible addition to a doctor-led plan, not a substitute for one.
If you have talked to your doctor and want to understand the options, we break down the evidence in Best Nerve Supplements 2026, and you can explore the rest of our nerve health guides for related topics.
Frequently Asked Questions
What is the most common cause of peripheral neuropathy?
Diabetes is the leading cause. Prolonged high blood sugar damages the nerves and the small blood vessels that supply them, usually affecting the feet first. Vitamin B12 deficiency, heavy alcohol use, and thyroid problems are other common causes worth ruling out.
Can peripheral neuropathy be reversed?
It depends on the cause. When neuropathy comes from a reversible problem such as a vitamin B12 deficiency, a thyroid disorder, or better-controlled diabetes, symptoms may improve or stop progressing once the cause is treated. Nerve damage from long-standing conditions may be permanent, which is why early diagnosis matters.
What does peripheral neuropathy feel like?
Most people describe tingling or pins and needles, numbness, and burning or stabbing pain, often starting in the feet and sometimes the hands. Some notice extreme sensitivity to touch, muscle weakness, or a loss of balance, especially in the dark.
When should I see a doctor about nerve symptoms?
See a doctor for any new numbness, tingling, or weakness, for symptoms that are spreading or worsening, or for foot injuries you cannot feel. Seek urgent care for sudden, severe, or rapidly progressing symptoms, since these can point to a serious underlying condition.