Peripheral nerve injuries - Diagnosis and treatment (2024)

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Diagnosis

Your doctor will review your medical history, ask about any accidents or previous surgeries, and discuss your symptoms with you. Your doctor will also conduct a physical and neurological examination. If your neurological examination shows signs of a nerve injury, your doctor may recommend diagnostic tests, which may include:

  • Electromyography (EMG). In an EMG, a thin-needle electrode inserted into the muscle records the muscle's electrical activity at rest and in motion. Reduced muscle activity can indicate nerve injury.
  • Nerve conduction study. Electrodes placed at two different points in the body measure how well electrical signals pass through the nerves.
  • Magnetic resonance imaging (MRI). MRI uses a magnetic field and radio waves to produce detailed images of areas affected by nerve damage.
  • Ultrasound. Like MRI, these high-frequency sound waves produce detailed images of the area affected by nerve damage.

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Treatment

If a nerve is injured but not cut, the injury is more likely to heal. Injuries in which the nerve has been completely severed are very difficult to treat, and recovery may not be possible.

Your doctor will determine your treatment based on the extent and cause of your injury and how well the nerve is healing.

  • If your nerve is healing properly, you may not need surgery. You may need to rest the affected area until it's healed. Nerves recover slowly, and maximal recovery may take many months or several years.
  • You'll need regular checkups to make sure your recovery stays on track.
  • If your injury is caused by a medical condition, your doctor will treat the underlying condition.
  • Depending on the type and severity of your nerve injury, you may need medications such as aspirin or ibuprofen (Advil, Motrin IB, others) to relieve your pain. Medications used to treat depression, seizures or insomnia may be used to relieve nerve pain. In some cases, you may need corticosteroid injections for pain relief.
  • Your doctor may recommend physical therapy to prevent stiffness and restore function.

Surgery

Peripheral nerve graft

Peripheral nerve injuries - Diagnosis and treatment (1)

Peripheral nerve graft

To repair a damaged nerve, a surgeon removes a small part of the sural nerve in the leg and implants this nerve at the site of the repair.

Sometimes the surgeon can borrow another working nerve to make an injured nerve work (nerve transfer).

Peripheral nerve transfer

Peripheral nerve injuries - Diagnosis and treatment (2)

Peripheral nerve transfer

Your surgeon can bypass a damaged section of nerve by connecting a healthy nerve to restore function.

If your injury does not seem to be healing properly, your surgeon can use EMG testing in the operating room to assess whether scarred nerves are recovering. Doing an EMG test directly on the nerve is more accurate and reliable than doing the test over the skin.

Sometimes a nerve sits inside a tight space (similar to a tunnel) or is squeezed by scarring. In these cases, your surgeon may enlarge the tight space or free the nerve from the scar.

Sometimes a section of a nerve is cut completely or damaged beyond repair. Your surgeon can remove the damaged section and reconnect healthy nerve ends (nerve repair) or implant a piece of nerve from another part of your body (nerve graft). These procedures can help your nerves regrow.

If you have a particularly severe nerve injury, your doctor may suggest surgery to restore function to critical muscles by transferring tendons from one muscle to another.

Restoring function

A number of treatments can help restore function to the affected muscles.

  • Braces or splints. These devices keep the affected limb, fingers, hand or foot in the proper position to improve muscle function.
  • Electrical stimulator. Stimulators can activate muscle served by an injured nerve while the nerve regrows. However, this treatment may not be effective for everyone. Your doctor will discuss electrical stimulation with you if it's an option.
  • Physical therapy. Therapy involves specific movements or exercises to keep affected muscles and joints active. Physical therapy can prevent stiffness and help restore function and feeling.
  • Exercise. Exercise can help improve your muscle strength, maintain range of motion and reduce muscle cramps.

Clinical trials

Explore Mayo Clinic studies testing new treatments, interventions and tests as a means to prevent, detect, treat or manage this condition.

Preparing for your appointment

A number of tests may be used to help diagnose the type and severity of peripheral nerve injury. When you make your appointment, be sure to ask whether you need to prepare for these tests. For instance, you may need to stop taking certain medications for a few days or avoid using lotions the day of the test.

If possible, take along a family member or friend. Sometimes it can be difficult to absorb all the information you're given during an appointment. Someone who accompanies you may remember something that you forgot or missed.

Other suggestions for getting the most from your appointment include:

  • Write down all your symptoms, including how you were injured, how long you've had your symptoms and whether they've gotten worse over time.
  • Make a list of all medications, vitamins and supplements that you're taking.
  • Don't hesitate to ask questions. Children and adults with peripheral nerve injuries have several options for restoring lost function. Be sure to ask your doctor about all the possibilities available to you or your child. If you run out of time, ask to speak with a nurse or have your doctor call you later.

By Mayo Clinic Staff

Peripheral nerve injuries care at Mayo Clinic

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May 10, 2022

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  1. Peripheral neuropathy fact sheet. National Institute of Neurological Disorders and Stroke. https://www.ninds.nih.gov/Disorders/Patient-Caregiver-Education/Fact-Sheets/Peripheral-Neuropathy-Fact-Sheet. Accessed Feb. 28, 2022.
  2. Nerve injuries. American Academy of Orthopaedic Surgeons. https://orthoinfo.aaos.org/topic.cfm?topic=A00016. Accessed Feb. 28, 2022.
  3. Rutkove SB. Overview of upper extremity peripheral nerve syndromes. https://www.uptodate.com/contents/search. Accessed Feb. 28, 2022.
  4. Rutkove SB. Overview of lower extremity peripheral nerve syndromes. https://www.uptodate.com/contents/search. Accessed Feb. 28, 2022.
  5. NINDS pinched nerve information page. National Institute of Neurological Disorders and Stroke. https://www.ninds.nih.gov/Disorders/All-Disorders/Pinched-Nerve-Information-Page#disorders-r1. Accessed Feb. 28, 2022.
  6. Azar FM, et al. Peripheral nerve injuries. In: Campbell's Operative Orthopaedics. 14th ed. Elsevier; 2021. https://www.clinicalkey.com. Accessed Feb. 28, 2022.
  7. Daroff RB, et al. Trauma of the nervous system: Peripheral nerve trauma. In: Bradley and Daroff's Neurology in Clinical Practice. 8th ed. Elsevier; 2022. https://www.clinicalkey.com. Accessed Feb. 28, 2022.
  8. Neurological diagnostic tests and procedures fact sheet. National Institute of Neurological Disorders and Stroke. https://www.ninds.nih.gov/disorders/patient-caregiver-education/fact-sheets/neurological-diagnostic-tests-and-procedures-fact. Accessed Feb. 28, 2022.
  9. Neligan PC. Peripheral nerve injuries of the upper extremity. In: Plastic Surgery. Elsevier; 2018. https://www.clinicalkey.com. Accessed Feb. 28, 2022.
  10. Pain: Hope through research. National Institute of Neurological Disorders and Stroke. https://www.ninds.nih.gov/Disorders/Patient-Caregiver-Education/Hope-Through-Research/Pain-Hope-Through-Research. Accessed Feb. 28, 2022.
  11. Brachial plexus injuries information page. National Institute of Neurological Disorders and Stroke. https://www.ninds.nih.gov/Disorders/All-Disorders/Brachial-Plexus-Injuries-Information-Page. Accessed Jan. 6, 2020.

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Peripheral nerve injuries - Diagnosis and treatment (2024)

FAQs

How do you diagnose a peripheral nerve injury? ›

Diagnosis of Peripheral Nerve Injury

Two of these tests are electromyography and nerve conduction velocity. These tests are sometimes done during actual surgery while the patient is sedated. The doctor may also order any of the following imaging techniques: CT scan.

What are signs that nerve damage is healing? ›

Sharp, shooting, electric pains are normal signs of nerve recovery. The signal should extend to the farthest distal nerve ending. It is the body's way of communicating the direction of where to travel. The scar should become less sensitive as a sign of recovery.

How long before nerve damage is permanent? ›

Motor nerves have a time limit for healing. The reason for this is a structure called the 'motor endplate', where the nerve joins into the muscle. If the motor endplate receives no nerve impulse for more than 18-24 months, it dies away and there is no longer any way that the muscle can be activated by the nerve.

How is peripheral nerve damage diagnosed? ›

Nerve function tests.

Electromyography (EMG) measures and records electrical activity in your muscles to find nerve damage. A thin needle (electrode) is inserted into the muscle to measure electrical activity as you contract the muscle. During an EMG , a nerve conduction study is typically also done.

How do you treat peripheral nerve damage? ›

If your nerve is only injured, you may recover over time without surgery. Nerves heal slowly, sometimes over many months. For these mild nerve injuries, nonsurgical treatment options include medication, physical therapy or massage therapy. Peripheral nerve surgery can reconstruct or repair damaged nerves.

What is the most common peripheral nerve injury? ›

The most common peripheral nerve injury is carpal tunnel syndrome, which affects the median nerve in the wrist. Carpal tunnel syndrome is a condition in which the median nerve, which runs from the forearm into the hand, becomes compressed or pinched as it passes through a narrow passageway called the carpal tunnel.

What are the three stages of nerve damage? ›

Stages of Neuropathy
  • Stage One: Numbness & Pain. In this beginning stage, patients become aware that something feels “off” with the nerves in their hands and/or feet. ...
  • Stage Two: Constant Pain. ...
  • Stage Three: Intense Pain. ...
  • Stage Four: Complete Numbness/ Loss of Sensation.
Sep 4, 2020

Do damaged nerves ever heal? ›

Some damaged nerves heal on their own, but some injuries are too severe for the nerve to regrow. If a patient has a serious peripheral nerve injury, we have methods to restore muscle function that didn't exist 30 years ago. But it's also important to know there's often a ticking clock with nerve injuries.

What are the 3 stages of nerve healing? ›

To achieve full recovery, the nerve must undergo three main processes: Wallerian degeneration (the clearing process of the distal stump), axonal regeneration, and end-organ reinnervation.

Can you become paralyzed from peripheral neuropathy? ›

Peripheral Neuropathy Symptoms

The symptoms of peripheral neuropathy vary based on the type that you have and what part of the body is affected. Symptoms can range from tingling or numbness in a certain body part to more serious effects such as burning pain or paralysis.

What is the best exercise for nerve damage? ›

4 Exercises to Reduce Chronic Nerve Pain
  • Go for a Walk. Aim to walk 30 minutes a day five days a week with a 20-minute stretch prior. ...
  • Low-Impact Aerobic Exercises. If kickboxing is not your style, take it easy with a nice afternoon of swimming or cycling. ...
  • Resistance Training. ...
  • Stretching Increases Flexibility.
Apr 4, 2017

Is nerve damage a disability? ›

Nerve damage can be considered a disability. Damage to your peripheral nerves, or those outside of your brain and spine, can affect various parts of your body. This can affect various systems of the body but is often associated with symptoms in the limbs. This is referred to as Peripheral Neuropathy.

What is the prognosis for peripheral nerve damage? ›

Your treatment is based on the extent and cause of your injury and how well the nerve is healing. If your nerve is healing properly, you may not need surgery. You may need to rest the affected area until it's healed. Nerves recover slowly, and maximal recovery may take many months or several years.

How serious is peripheral nerve damage? ›

Peripheral neuropathy is usually not dangerous, but it can have very disruptive effects on your life. These effects are usually not as severe when it only affects one nerve or a limited group of nerves. The more nerves it affects, the greater the potential impact. The outlook also depends partly on your symptoms.

Should you walk a lot with neuropathy? ›

There are several benefits of exercise like walking. They will help you manage weight, improve blood sugar levels and blood flow, get more oxygen and nutrients to your legs, improve muscle strength, and help you get better sleep. This will all have a positive effect on your neuropathy.

How does a neurologist diagnose peripheral neuropathy? ›

Frequently the neurologist will recommend electrodiagnostic testing to measure the electrical activity of muscles and nerves. If necessary, the neurologist may also recommend blood tests, a nerve biopsy, a skin biopsy, a spinal tap or magnetic resonance imaging (MRI).

What does peripheral nerve damage feel like? ›

Symptoms of peripheral neuropathy

The main symptoms can include: numbness and tingling in the feet or hands. burning, stabbing or shooting pain in affected areas. loss of balance and co-ordination.

How does a neurologist check for peripheral neuropathy? ›

HOW IS A DIAGNOSIS OF PERIPHERAL NEUROPATHY MADE? Peripheral neuropathy is diagnosed on the basis of a clinical assessment conducted by a neurologist, which includes taking the history of the patient's symptoms, and a physical examination. Often, nerve conduction studies will also be performed to confirm the diagnosis.

Does peripheral neuropathy show up on EMG? ›

EMG, which consists of nerve conduction studies and needle electromyography, is an essential diagnostic tool in the evaluation of patients with suspected peripheral neuropathy. Many neurologists order an EMG for all patients with suspected peripheral neuropathy.

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