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Peripheral Neuropathy

Peripheral neuropathy is nerve damage that causes numbness, tingling, burning pain, or weakness, most often in the feet and hands; diabetes is the most common cause.

Neurologic
Peripheral neuropathy is damage to the nerves outside the brain and spinal cord — the nerves that carry sensation and movement signals to the limbs and organs. It most often affects the feet and hands, and it is common: millions of Americans live with some form of neuropathy. Because damaged nerves heal slowly, if at all, finding and treating the cause early makes a real difference. Symptoms range from mildly annoying tingling to pain, numbness, and weakness that interfere with walking, sleep, and quality of life.

Causes

Many conditions can injure peripheral nerves, and sometimes more than one cause is present:
  • Diabetes: The most common cause in the United States. Longstanding high blood sugar from diabetes damages small nerve fibers, producing the distinct pattern known as diabetic neuropathy.
  • Vitamin B12 deficiency: Low B12 injures nerves and can also cause anemia; it is especially common in older adults and people taking metformin or acid-reducing medication long term.
  • Alcohol: Heavy, prolonged alcohol use is directly toxic to nerves and depletes key vitamins.
  • Thyroid disease: An underactive thyroid (hypothyroidism) can contribute to nerve dysfunction.
  • Medications and toxins: Certain chemotherapy drugs and some antibiotics can cause neuropathy.
  • Other causes: Autoimmune disease, infections, kidney disease, and inherited disorders. In a portion of cases, no cause is found despite thorough testing.

Symptoms

Symptoms usually begin gradually in the toes and feet and may spread upward in a "stocking-and-glove" pattern:
  • Numbness and tingling: Reduced feeling or pins-and-needles sensations in the feet or hands.
  • Burning or stabbing pain: Nerve pain that is often worse at night and can interfere with sleep.
  • Sensitivity to touch: Even bedsheets brushing the feet may be uncomfortable.
  • Weakness and balance problems: Unsteadiness, stumbling, or falls, especially in the dark.
  • Autonomic symptoms: When the nerves that regulate automatic functions are involved, symptoms can include dizziness on standing, digestive upset, and changes in sweating.

Diagnosis

Your physician will examine sensation, reflexes, strength, and balance, and check the feet for unnoticed injuries. Blood tests typically screen for diabetes and prediabetes, vitamin B12 deficiency, thyroid disease, and kidney function. When the picture is unclear or weakness is prominent, nerve-conduction studies and electromyography (EMG) can characterize the nerve damage. Rapidly worsening weakness is not typical of common neuropathy and warrants prompt evaluation. Because neuropathy can be the first clue to an undiagnosed medical condition, new nerve symptoms are always a reason to look for the cause rather than simply mask the discomfort.

Treatment

Treatment has two goals — stop further nerve damage and relieve symptoms:
  • Treat the underlying cause: Tight blood-sugar control, vitamin B12 replacement, stopping alcohol, correcting thyroid disease, or adjusting an offending medication.
  • Nerve-pain medications: Gabapentin or pregabalin, and the antidepressant duloxetine, are proven options for neuropathic pain; ordinary pain relievers usually help little.
  • Topical treatments: Capsaicin or lidocaine products applied to the skin can take the edge off localized pain with few side effects.
  • Foot care: Daily foot checks, well-fitting shoes, and prompt attention to sores — numb feet can hide serious injuries.
  • Physical therapy: Balance and strength training reduces fall risk.
Peripheral neuropathy is best managed with steady follow-up. The internal-medicine team at Zimmer Medical Group can search for the cause, protect your feet, and tailor treatment — schedule an evaluation if you have persistent numbness or nerve pain. Bringing a list of your medications and supplements to the visit often provides important clues.

Living With Peripheral Neuropathy

Peripheral neuropathy describes damage to the nerves outside the brain and spinal cord, and it produces a characteristic pattern: numbness, tingling, burning, or pain beginning in the toes and feet and progressing upward over time, symmetrically. That stocking distribution reflects the fact that the longest nerves are affected first.

Finding the cause changes the treatment

Diabetes is the most common cause in this country, but it is far from the only one, and a proportion of neuropathies attributed to diabetes turn out to have another explanation. Vitamin B12 deficiency, thyroid disease, alcohol, kidney disease, certain medications including some chemotherapy agents, and autoimmune conditions all cause neuropathy, and several of those are treatable in a way that changes the trajectory rather than merely masking symptoms.

Foot care becomes a daily discipline

The loss of protective sensation is what makes neuropathy dangerous rather than merely uncomfortable. An injury that would normally hurt goes unnoticed, and in someone with reduced circulation it becomes an ulcer. Daily inspection of the whole foot including between the toes, properly fitted footwear, never going barefoot, and checking water temperature by hand rather than by foot all matter considerably more than they sound.

Treating the pain

Neuropathic pain does not respond well to ordinary analgesics. Gabapentin, pregabalin, and duloxetine are the first-line options, and topical agents help some people. Realistic expectations matter: a 30 to 50 percent reduction with better sleep and function is a good outcome, and patients expecting elimination often abandon a drug that is working.

What helps beyond medication

Glycemic control slows progression in diabetic neuropathy and is the closest thing to disease modification available. Exercise, balance training to reduce falls, treating coexisting sleep problems and low mood, and avoiding alcohol all contribute. Our neurology team investigates unexplained neuropathy, and the diabetic neuropathy and B12 deficiency pages cover two of the commonest causes. The NINDS peripheral neuropathy resource and NIDDK cover causes and management.

Falls are the underestimated risk

Loss of position sense in the feet impairs balance more than most people realise, and neuropathy is an independent risk factor for falls and fracture. Balance training, appropriate footwear, adequate lighting at night, and removing trip hazards all matter. Where the neuropathy is advanced, a walking aid is protective rather than a concession.

If numbness is spreading, you have noticed weakness, or you have found an injury you did not feel, schedule a visit.

Frequently Asked Questions

Because the longest nerves are affected first, and the nerves reaching the toes are the longest in the body. This produces the characteristic stocking pattern that progresses upward, and later a glove pattern in the hands as shorter nerves become involved.
No, though diabetes is the most common cause. B12 deficiency, thyroid disease, alcohol, kidney disease, certain medications, and autoimmune conditions all cause neuropathy — and several of those are treatable in ways that change the course rather than just the symptoms.
Sometimes, when a reversible cause is found and corrected early — B12 deficiency and thyroid disease in particular. Established damage from long-standing diabetes generally does not reverse, though progression can be slowed considerably by glycemic control.
Because neuropathic pain arises from nerve dysfunction rather than tissue injury, and NSAIDs and acetaminophen act on the latter. Gabapentin, pregabalin, and duloxetine work through different mechanisms and are the appropriate first-line treatments.

Related Medications

Commonly prescribed medications for this condition

GabapentinPregabalinDuloxetine

Related resources

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