Peripheral Neuropathy

Peripheral neuropathy is damage or dysfunction of nerves outside the brain and spinal cord.

These nerves carry sensation, help control muscles and contribute to automatic functions such as sweating. Symptoms often begin in the toes or fingers and can move upward, but the pattern depends on which nerves are affected.

Numbness and tingling are very common presentations of peripheral neuropathy. People may also describe burning, electric-shock sensations, stabbing pain, sensitivity to light touch, or reduced ability to feel heat and injury.

When motor nerves are involved, weakness, clumsiness or foot drop may occur. Loss of position sense can affect balance. Restless legs can be a common presentation, although it also has other possible causes.

Diabetes is a frequent cause of peripheral nerve damage. Other causes include alcohol-related nerve injury, vitamin deficiencies, certain medicines, infections, autoimmune illness, inherited conditions, kidney disease, pressure on a nerve, and injury. In some cases, no single cause is found.

Symptoms may be stable, slowly progressive or improve when a contributing cause is addressed. Pain can vary during the day, and numbness may make an injury easier to miss. New rapidly developing weakness, trouble walking, or symptoms affecting breathing or swallowing need urgent medical assessment.

A history of diabetes, heavy alcohol use, restricted nutrition, kidney disease, chemotherapy, autoimmune disease or close relatives with similar nerve symptoms can guide the assessment. Foot problems deserve particular attention when sensation is reduced.

Assessment includes a history of symptoms, medicines and health conditions, plus examination of strength, reflexes, sensation, balance and feet. Blood tests can look for treatable contributors such as blood sugar changes or vitamin deficiency. Nerve conduction studies, electromyography or imaging may be used when the pattern needs clarification.

Treatment is based on the likely cause and the symptoms that matter most. This can include improving glucose management, correcting a deficiency, changing a contributing medicine under supervision, pain-relieving medicines, physiotherapy, and support for balance or footwear. Nerve pain often needs a different approach from ordinary muscle pain.

Inspect feet daily, including between the toes, and use a mirror or ask for help if needed. Test bath water with an unaffected area or a thermometer, choose supportive shoes, and keep walkways well lit and clear. Report a blister, cut, redness, swelling or change in a toenail early.

Reduced feeling can allow a wound or burn to worsen before it is noticed. Weakness and balance changes can increase falls risk. Persistent pressure or unnoticed injury in the foot can contribute to ulcers, particularly alongside diabetes; prompt foot care helps limit harm.

Managing long-term health conditions, eating a varied diet, limiting alcohol where appropriate, reviewing medicines, and protecting hands and feet from repeated pressure or burns can reduce preventable contributors. Regular checks are useful when symptoms or diabetes are present.

A primary-care clinician can arrange initial tests and coordinate care. Depending on the findings, a neurologist, diabetes team, podiatrist, physiotherapist or pain specialist may contribute to treatment.