Neuropathy — also called peripheral neuropathy — refers to damage or dysfunction of one or more peripheral nerves, the vast network of nerves that transmit signals between the brain, spinal cord, and the rest of the body. When these nerves are damaged, they can send incorrect or distorted signals, resulting in pain, weakness, numbness, or other symptoms.

Types of Neuropathy

Neuropathy is classified by how many nerves are affected and which nerve fibers are involved:

• Mononeuropathy – damage to a single nerve (e.g., carpal tunnel syndrome)
• Polyneuropathy – damage to multiple nerves throughout the body, often symmetrical
• Autonomic neuropathy – affects nerves that control involuntary functions (heart rate, digestion, bladder)
• Focal neuropathy – sudden weakness in one area, often the face, torso, or leg

Common Causes

Neuropathy can stem from a wide variety of underlying conditions, including:

• Diabetes – the most common cause; high blood sugar gradually damages nerve fibers
• Autoimmune diseases (lupus, rheumatoid arthritis, Guillain-Barré syndrome)
• Infections (shingles, Lyme disease, HIV)
• Nutritional deficiencies (particularly B vitamins)
• Toxin exposure (alcohol, certain chemotherapy drugs, heavy metals)
• Kidney or thyroid disorders
• Inherited conditions (Charcot-Marie-Tooth disease)
• Physical trauma or injury to nerves

Symptoms

Symptoms vary depending on which type of nerves are affected:

• Tingling or “pins and needles” sensation, often in hands or feet
• Sharp, burning, or stabbing pain
• Numbness or reduced sensation
• Muscle weakness or loss of coordination
• Sensitivity to touch (even light touch can be painful)
• Falling or balance problems
• In autonomic cases: abnormal blood pressure, digestive issues, or bladder problems

Diagnosis

A physician will typically begin with a thorough medical history and physical and neurological examination. Additional testing may include blood tests to identify underlying conditions, nerve conduction studies (NCS), electromyography (EMG), skin or nerve biopsies, and imaging studies.

Treatment Options

Treatment focuses on managing the underlying cause and relieving symptoms. Common approaches include:

• Medications: anticonvulsants (gabapentin, pregabalin), antidepressants, topical treatments (lidocaine, capsaicin), or pain relievers
• Physical therapy to improve strength, balance, and coordination
• Transcutaneous electrical nerve stimulation (TENS)
• Lifestyle modifications: blood sugar control, limiting alcohol, nutritional support
• Surgical intervention in cases caused by nerve compression

Living with Neuropathy

While some types of neuropathy are reversible — particularly when caught early and the underlying cause is treated — others are progressive or chronic. Many people find significant relief through a combination of medical treatment, physical therapy, and lifestyle adjustments. Working closely with a neurologist or pain specialist is important to developing an individualized management plan.