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The most common condition that causes Lhermitte’s sign is multiple sclerosis (MS). Studies found that nearly 1 in 3 people diagnosed with MS experience Lhermitte’s sign at least once in their lifetime.

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Lhermitte’s sign isn’t dangerous or life-threatening. It doesn’t last long and may be lessened by avoiding movements that trigger it. This symptom can appear once or several times throughout your life depending on the cause.

Damage to the nerves in the spinal cord causes Lhermitte’s sign. This nerve damage is known as a lesion, or “scar.” A healthcare provider may find a lesion in your neck (cervical spine) on an imaging test.

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One way to prevent the symptom is to avoid things that trigger it, like bending your head forward. This isn’t always possible, as this is a very common movement.

Managing the underlying condition that causes this symptom can help you experience it less often. A healthcare provider might also recommend the following:

There isn’t a specific Lhermitte’s sign test available. A healthcare provider may offer imaging tests to determine what caused this symptom, like an MRI (magnetic resonance imaging) scan.

When this covering is damaged, certain neck movements may cause the affected nerve to overreact. It sends pain signals to your brain and makes you feel a shock-like sensation along your spine.

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You can also talk to your healthcare provider about ways to reduce coughing and sneezing, especially if you have allergies or an underlying illness that can make Lhermitte’s sign worse.

As there are many possible causes, your healthcare provider will create a treatment plan that’s specific to your situation. What works for you to treat this symptom may be different from what works for someone else.

Another test, called a spurling test, is sometimes used to diagnose some types of neck pain. A healthcare provider will guide your physical movements to see if the movements cause pain. A positive test result means you experienced neck pain during the test and likely have nerve compression in your spine.

You may hear your healthcare provider refer to Lhermitte’s sign as Lhermitte’s phenomenon, barber chair phenomenon or acute paroxysmal pain.

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A lesion usually occurs due to demyelination (the destruction of myelin). Myelin is the protective cover around a nerve cell. Myelin helps messages pass from your brain to other parts of your body.

If you experience an electrical sensation when you make certain movements without a known cause, visit a healthcare provider.

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This isn’t an exhaustive list of all causes of this symptom. A healthcare provider will diagnose the underlying cause to help you treat it.

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Lhermitte’s sign is a fast but painful electrical sensation that travels from your neck down your spine. It can radiate to your arms and legs. It only lasts a few seconds. This is a common symptom of multiple sclerosis. Treatment is available if this symptom is bothersome.

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There isn’t a way to entirely prevent Lhermitte’s sign. Treating any conditions that lead to this symptom can reduce how often you experience it.

Lhermitte’s sign (pronounced “lair-meets-sign”) is a quick, painful, shock-like electrical sensation you feel along your neck and spine. It can spread to your arms and legs. You might feel this sensation when you tilt your head forward, cough or sneeze. It only lasts for a few seconds at a time, but can occur many times per day.

Lhermitte’s sign can feel like you stuck your finger in an electrical socket and touched a live wire. This brief but painful sensation travels down your spine from your neck. It usually happens when you least expect it, like when you’re bending over to pick something up or after you sneeze. Luckily, this pain only lasts for a few seconds. A healthcare provider can help you determine what caused this symptom and find ways to treat it.